identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03FCE539FFB63D619051FB82313C9951.text	03FCE539FFB63D619051FB82313C9951.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx Dall 1889	<div><p>Genus Leucosyrinx Dall, 1889</p><p>Pleurotoma (Leucosyrinx) Dall, 1889: 75 .</p><p>Type species</p><p>Pleurotoma (Pleurotomella) verrillii Dall, 1881 (OD).</p><p>Diagnosis</p><p>Shell small to large, reaching 90 mm in length ( L. bolognai), narrow to broad fusiform, spire high, siphonal canal distinct, medium-long to long. Shell uniformly colored, from off-white to beige and light brown. Protoconch paucispiral, small, diameter about 1 mm, of 1.5–1.75 rounded whorls. Teleoconch whorls roundly angled at shoulder, at least on upper whorls, with well-defined concave subsutural ramp.</p><p>Axial sculpture of usually strong, oblique, axial ribs, present on shoulder and below, not extending to subsutural ramp. Ribs can be reduced just to knobs on shoulder, but can extend to periphery and even shell base. Spiral sculpture from weak to rather strong, of uniform spiral cords, that can be present or absent on subsutural ramp.</p><p>Anal sinus moderately deep, subsutural, broadly arcuate, extends across entire subsutural ramp, and confluent with large forward extension of outer lip.</p><p>Operculum narrow to medium-broad leaf-shaped, nucleus terminal.</p><p>Radular marginal teeth duplex (Fig. 2), narrow to broad lanceolate, rather flat in dorsal view, particularly in anterior part (tooth tip). Major limb pointed, with sharp cutting edges (Fig. 2C – bl), broadest at midlength and narrowing towards both ends, with rather distinct socket on dorsal surface where accessory limb embeds. Central formation very weak to completely absent, of indistinct symmetrical folds of the membrane and rarely with very weak central cusp.</p><p>Remarks</p><p>As confirmed by molecular data, Leucosyrinx exhibits significant variability in shell shape, size, and, to a lesser extent, in spiral and axial sculpture. Nonetheless, certain key diagnostic features can be identified. The axial folds, which may be limited to nodules on the shoulder or extend to the shell periphery, are consistently absent on the subsutural ramp. The ramp, including the zone immediately adjacent to the upper suture, is either smooth or exclusively features spiral cords and lacks any other elements. The anal sinus located subsuturally, commences at the upper suture and extends across the entire ramp. Correspondingly, the sinus line in its upper part is prosocline and concave. Below, the sinus is confluent with a notable forward arcuate projection of the outer lip, enhancing the impression of depth in the generally medium-deep sinus.</p><p>There are several genera, superficially similar to Leucosyrinx . The species treated here as members of Leucosyrinx were often confused with genera discussed below, and vice versa some species belonging to those genera were erroneously attributed to Leucosyrinx .</p></div>	https://treatment.plazi.org/id/03FCE539FFB63D619051FB82313C9951	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFB73D6E9288FCBC30C8986D.text	03FCE539FFB73D6E9288FCBC30C8986D.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Antarctospira Kantor, Harasewych & Puillandre 2016	<div><p>Genus Antarctospira Kantor, Harasewych &amp; Puillandre, 2016</p><p>(family Borsoniidae)</p><p>Antarctospira Kantor, Harasewych &amp; Puillandre, 2016: 4–5 .</p><p>Type species</p><p>Leucosyrinx badenpowelli Dell, 1990 (OD).</p><p>Remarks</p><p>The Antarctic-subAntarctic genus Antarctospira shares the axial sculpture pattern as well as the shape and position of the anal sinus with Leucosyrinx (Kantor et al. 2016) . Notably, four out of the five species attributed to Antarctospira were initially classified as Leucosyrinx: Antarctospira badenpowelli (Dell, 1990) (type species), A. mawsoni (Powell, 1958), A. paragenota (Powell, 1951), A. falklandica (Powell, 1951) . However, the examination of the radula revealed that Antarctospira possesses a radula with hypodermic marginal teeth thus suggesting its placement within the family Borsoniidae Bellardi, 1875 . Furthermore, all species of Antarctospira have a much shorter and broader siphonal canal, which is barely separable from high and broad aperture. Its paucispiral protoconch is larger, attaining 2.5 mm in diameter (vs ca 1 mm in Leucosyrinx).</p></div>	https://treatment.plazi.org/id/03FCE539FFB73D6E9288FCBC30C8986D	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFB83D6E9288FD51303E9C19.text	03FCE539FFB83D6E9288FD51303E9C19.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Comitas H. J. Finlay 1926	<div><p>Genus Comitas Finlay, 1926</p><p>(family Pseudomelatomidae)</p><p>Comitas Finlay, 1926: 251 .</p><p>Type species</p><p>Surcula oamarutica Suter, 1917</p><p>(= Drillia fusiformis Hutton, 1877) (Lower Miocene, New Zealand) (OD).</p><p>Remarks</p><p>Species of Comitas have a very distinctive radula (Fig. 3F), reliably distinguishing them from all other conoideans, including Leucosyrinx . Nonetheless, the radula was examined in very few species, namely: Comitas galatheae Powell, 1969 (Kosuge 1986: pl. 33 figs 7–11); C. murrawolga (Garrard, 1961) and C. onokeana vivens Dell, 1956 (Kantor &amp; Taylor 2000: fig. 2a–e); C. pachycercus Sysoev &amp; Bouchet, 2001 (Sysoev &amp; Bouchet 2001: figs 14, 16); Comitas sp. (Bouchet et al. 2011: fig. 15c–d). The mentioned species together with the type species of the genus can be separated from Leucosyrinx on the following conchological characters: the shell is generally large, usually over 50 mm in length, with broad and long axial ribs, always extending to the periphery and sometimes to the shell base. The anal sinus is moderately deep, medium broad U-shaped, on the subsutural ramp and occupying the lower part of the subsutural ramp, not on all its width, so that the deepest point is closer to shoulder than to suture (Fig. 3E). Correspondingly the sinus line in its upper part is prosocline, but convex.</p><p>There is significant overlap in shell characters between Comitas and Leucosyrinx, so that attributing the species known only from empty shells is sometimes problematic. Thus, although Powell (1966) recognized the differences in position of the anal sinus between these genera, he attributed without discussion numerous species with subsutural sinus to Comitas (Powell 1969) that are conchologically closer to Leucosyrinx as defined here.</p></div>	https://treatment.plazi.org/id/03FCE539FFB83D6E9288FD51303E9C19	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFB83D6C9288F98537659B8B.text	03FCE539FFB83D6C9288F98537659B8B.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Sibogasyrinx Powell 1969	<div><p>Genus Sibogasyrinx Powell, 1969</p><p>(family Cochlespiridae)</p><p>Leucosyrinx (Sibogasyrinx) Powell, 1969: 343 (23-411).</p><p>Type species</p><p>Surcula pyramidalis Schepman, 1913 (OD).</p><p>Remarks</p><p>The molecular phylogenetic analysis of nine species of Sibogasyrinx (Kantor &amp; Puillandre 2021) demonstrated that all species attributed to the genus have a row of nodules situated directly below the suture (Fig. 3G–H). On the contrary, none of Leucosyrinx as defined here by molecular analysis has these nodules. The significance of this diagnostic character was not recognized prior to the current publication and many species with subsutural nodules were erroneously attributed to Leucosyrinx or Comitas mostly by Powell (1969). Radula in Sibogasyrinx is characterized by duplex marginal teeth of varying morphology and the presence of a well-defined central formation with a long cusp (Kantor &amp; Puillandre 2021).</p></div>	https://treatment.plazi.org/id/03FCE539FFB83D6C9288F98537659B8B	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFBA3D6C9288FE77306D9E02.text	03FCE539FFBA3D6C9288FE77306D9E02.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Comispira Kantor, Fedosov & Puillandre 2018	<div><p>Genus Comispira Kantor, Fedosov &amp; Puillandre, 2018</p><p>(family Cochlespiridae)</p><p>Comispira Kantor, Fedosov &amp; Puillandre, 2018: 48 .</p><p>Type species</p><p>Leucosyrinx mai Li &amp; Li, 2008 (OD).</p><p>Remarks</p><p>Species of this genus resemble Sibogasyrinx in the presence of the subsutural row of nodules, but differ in usually more pronounced spiral sculpture on the shell base, of broadly-spaced and rather strong spiral cords. It should be mentioned that some species of Comispira, whose generic position is confirmed by molecular analysis, can have very weak, nearly obsolete subsutural nodules and rather uniform weak spiral sculpture on the shell base (Kantor et al. 2022). The radula is similar to that of Sibogasyrinx .</p><p>The mentioned diagnostic characters of Leucosyrinx and of similar genera allowed critical re-assessment of numerous species described on the basis of the shells alone and attributed to the above mentioned genera at one point or another.</p></div>	https://treatment.plazi.org/id/03FCE539FFBA3D6C9288FE77306D9E02	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFBA3D6A900FFBE830739C6B.text	03FCE539FFBA3D6A900FFBE830739C6B.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx floraecharlottae Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx floraecharlottae sp. nov.</p><p>urn:lsid:zoobank.org:act: ADDB5B90-B92A-4419-826D-25A8EC49C954</p><p>Figs 4A–F, 5A</p><p>Etymology</p><p>The species is named after Flora and Charlotte, the daughters of Tanya Karagyozova, the project manager of the ERC project HYPERDIVERSE.</p><p>Material examined</p><p>Holotype (sequenced) SOLOMON SEA • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=147.6&amp;materialsCitation.latitude=-6.0" title="Search Plazi for locations around (long 147.6/lat -6.0)">Vitiaz Strait</a>; 6°00′ S, 147°36′ E; depth 706–715 m; PAPUA NIUGINI, stn CP3995; MNHN-IM-2013-19852.</p><p>Other material (all sequenced)</p><p>PAPUA NEW GUINEA • 2 lv; 8°14′ S, 150°32′ E; depth 760–769 m; BIOPAPUA, stn CP3736; MNHN-IM-2009-17046, MNHN-IM-2009-17052 • 1 lv; 9°14′ S, 152°18′ E; depth 694–766 m; BIOPAPUA, stn CP3741; MNHN-IM-2009-17050 • 1 lv; New Britain, north of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=151.83333&amp;materialsCitation.latitude=-4.0666666" title="Search Plazi for locations around (long 151.83333/lat -4.0666666)">Rabaul</a>; 4°4′ S, 151°50′ E; depth 702–724 m; BIOPAPUA, stn CP3672; MNHN-IM-2009-17133 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 29.2 mm, AL (with canal) 13.3 mm, AL (without canal) 8.9 mm, SW 9.1 mm.</p><p>SHELL (holotype). Medium-sized, fusiform, with high spire, fragile, of uniform light tan in color. 9.75 teleoconch whorls. Paucispiral protoconch of 1.5 rounded whorls, flattened on top. Protoconchteleoconch transition indistinct due to erosion, marked by appearance of axial ribs. Teleoconch whorls roundly angled at shoulder, with weakly concave subsutural ramp. Shallow, impressed, slightly wavy suture. 17 strong, oblique, short, broad, rounded axial folds on body whorl, 14 on penultimate whorl. Folds fade on subsutural ramp, weaken towards lower suture, disappear at body whorl periphery. Folds closer spaced on upper teleoconch whorls, on last whorl intervals narrower than folds. Weak spiral sculpture of low, rounded, indistinct narrow cords over entire shell. Numerous, thin growth lines, prominent on subsutural ramp. Shell base weakly convex, smooth transition to long, straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal. Inner lip slightly convex. Columellar and parietal sides with narrow, distinct callus, lighter than remaining last whorl. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 5A; studied in holotype). Short, 32 rows of teeth, 11–12 nascent. Central formation reduced to inconspicuous folds of radular membrane. Marginal teeth duplex, ~410 µm in length (4.6% of AL without canal). Anterior part of tooth dorso-ventrally flattened, with sharp cutting edges in lateral view. Major limb narrowly lanceolate, slightly curved. Accessory limb nearly twice as narrow, ~0.75 of total tooth length, inserted into shallow but distinct socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 5 cox 1 sequences)</p><p>‘A’ in site 220, ‘C’ in site 448, ‘C’ in site 598.</p><p>Remarks</p><p>The largest specimen attains SL 32.7 mm.</p><p>Leucosyrinx floraecharlottae sp. nov. is somewhat variable in shell slenderness, from nearly biconic in holotype to medium-broad fusiform.</p><p>The holotype of the new species bears a resemblance to L. verrillii (Dall, 1881), the type species of the genus from the Atlantic, in terms of its shell shape and sculpture pattern. However, it differs in having a generally slenderer and smaller shell with much less pronounced spiral sculpture. Another similar species is L. breviplicata (E.A. Smith, 1899), which differs in much more pronounced and broadly-spaced spiral cords. The molecular phylogenetic analysis has demonstrated that these two species are not closely related to L. floraecharlottae sp. nov.</p><p>Leucosyrinx floraecharlottae sp. nov. demonstrates close resemblance to L. lemarcisi sp. nov., and to a lesser extent to L. ringevali sp. nov., L. farhatorum sp. nov. and L. rattiae sp. nov., all of them not phylogenetically related to L. floraecharlottae . For the morphological differences see remarks of the corresponding species.</p><p>Distribution</p><p>Papua New Guinea, 694– 760 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFBA3D6A900FFBE830739C6B	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFBC3D689056F95733AB9C4F.text	03FCE539FFBC3D689056F95733AB9C4F.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx lemarcisi Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx lemarcisi sp. nov.</p><p>urn:lsid:zoobank.org:act: ED2EA493-88AF-491B-841F-2CF0E71B95CA</p><p>Fig. 4G–J</p><p>Etymology</p><p>The species is named after Thomas Lemarcis, member of the ERC “HYPERDIVERSE” team, for his contribution to the neogatropod molecular phylogeny.</p><p>Material examined</p><p>Holotype (sequenced) SOCIETY ISLANDS • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=149.91667&amp;materialsCitation.latitude=-17.55" title="Search Plazi for locations around (long 149.91667/lat -17.55)">Moorea</a>; 17°33′ S, 149°55′ E; depth 800–830 m; TARASOC, stn DW3467; MNHN-IM-2007-38823</p><p>Other material (all sequenced)</p><p>SOCIETY ISLANDS • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=151.73334&amp;materialsCitation.latitude=-16.583334" title="Search Plazi for locations around (long 151.73334/lat -16.583334)">Bora Bora</a>; 16°35′ S, 151°44′ E; depth 1013–1060 m; TARASOC, stn DW3417; MNHN-IM-2007-39255 • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=151.8&amp;materialsCitation.latitude=-16.533333" title="Search Plazi for locations around (long 151.8/lat -16.533333)">Bora Bora</a>; 16°32′ S, 151°48′ E; depth 798–830 m; TARASOC, stn DW3419; MNHN-IM-2007-38850 • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=149.8&amp;materialsCitation.latitude=-17.45" title="Search Plazi for locations around (long 149.8/lat -17.45)">Moorea</a>; 17°27′ S, 149°48′ E; depth 1000– 1145 m; TARASOC, stn DW3462; MNHN-IM-2007-38674 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 26.0 mm, AL (with canal) 13.5 mm, AL (without canal) 8.7 mm, SW 8.6 mm.</p><p>SHELL (holotype). Small, fusiform, with high spire, fragile, of uniform light tan color.About 8 teleoconch whorls. Paucispiral protoconch of about 2 rounded whorls. Transition between protoconch and teleoconch indistinct due to protoconch and earliest teleoconch whorls erosion. Teleoconch whorls angled at shoulder, with distinctly concave subsutural ramp. Distinct, shallow, impressed suture. 12 strong, oblique, broad, rounded axial ribs on body whorl, 14 on penultimate one. Ribs rapidly disappear on subsutural ramp, slightly weaken towards lower suture, disappear at body whorl periphery. Intervals between ribs slightly broader than ribs themselves. Weak spiral sculpture of low, rounded, and narrow cords over entire shell surface, including subsutural ramp, slightly stronger on shell base and canal Numerous, thin growth lines, prominent on subsutural ramp. Shell base weakly curving, smooth transition to long, straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal. Inner lip nearly straight. Columellar and parietal sides with narrow, distinct callus. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA. Not examined.</p><p>DNA diagnosis (based on 4 cox 1 sequences)</p><p>‘G’ in site 73, ‘T’ in site 181, ‘C’ in site 544, ‘C’ in site 613.</p><p>Remarks</p><p>In shell outline this new species is very similar to Leucosyrinx floraecharlottae sp. nov., differing in a smaller size, less numerous axial ribs on shoulder and in stronger pronounced spiral cords on subsutural ramp. There is also a certain similarity to L. herosae sp. nov., which is much larger (up to 47 mm).Another similar species is Leucosyrinx sp. 18, represented in our material by two specimens. The new species differs from Leucosyrinx sp. 18 in having a relatively lower spire. None of them are phylogenetically related to L. lemarcisi sp. nov.</p><p>Distribution</p><p>Society Is., 800–1013 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFBC3D689056F95733AB9C4F	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFBE3D769061F9B3301D9936.text	03FCE539FFBE3D769061F9B3301D9936.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx farhatorum Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx farhatorum sp. nov.</p><p>urn:lsid:zoobank.org:act: 2935C93B-7AE1-4EDD-AC64-D1F18F5C30B9</p><p>Figs 4K–P, 5B–C</p><p>Leucosyrinx sp. C – Kantor &amp; Puillandre 2021: figs 11f, 13j.</p><p>Etymology</p><p>The species is named after Sarah Farhat, member of the ERC “HYPERDIVERSE” team, and her family for her contribution to the knowledge of the genome evolution of neogastropods.</p><p>Material examined</p><p>Holotype (sequenced) SOLOMON ISLANDS • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=157.56667&amp;materialsCitation.latitude=-7.9666667" title="Search Plazi for locations around (long 157.56667/lat -7.9666667)">New Georgia</a>; 7°58′ S, 157°34′ E; depth 650–836 m; SALOMON 2, stn CP2219; MNHN-IM-2007-42503.</p><p>Other material (all sequenced)</p><p>SOLOMON ISLANDS • 1 lv; 7°43′ S, 156°24′ E; depth 664–682 m; SALOMON 2, stn CP2246; MNHN-IM-2009-16752 .</p><p>VANUATU • 2 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=167.83333&amp;materialsCitation.latitude=-16.366667" title="Search Plazi for locations around (long 167.83333/lat -16.366667)">SE Malékula I.</a>; 16°22′ S, 167°50′ E; depth 637–644 m; SANTO 2006, stn AT130; MNHN-IM-2009-13498, MNHN-IM-2009-13499 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 41.2 mm, AL (with canal) 19.7 mm, AL (without canal) 12.8 mm, SW 12.7 mm.</p><p>SHELL (holotype). Medium-sized, fusiform, with a high spire, fragile, uniform light tan in color. 11+ teleoconch whorls, uppermost whorls and protoconch missing. Teleoconch whorls roundly angled at shoulder, with flat subsutural ramp. Shallow but distinct, narrowly canaliculate, and slightly wavy suture. 16 strong, oblique, medium broad, and rounded axial folds on body whorl, 17 on penultimate one. Folds fade on subsutural ramp, slightly weaken towards lower suture, disappear at body whorl slightly above periphery. Folds more closely spaced and distinct on upper teleoconch whorls, on posterior part of last whorl they weaken, nearly disappearing. Weak spiral sculpture of low, rounded, and indistinct narrow cords over entire shell. On subsutural ramp 12–13 cords on last whorl and 10 on penultimate whorl. Numerous thin growth lines, also prominent on subsutural ramp. Shell base weakly evenly convex, smooth transition to long, straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal aperture. Inner lip slightly convex. Columellar and parietal sides with narrow, distinct callus. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 5B–C; studied in two specimens, holotype and MNHN-IM-2009-13498, Vanuatu). Similar in tooth morphology. Radula in holotype short, of 25 rows of teeth, 8–10 nascent. Marginal teeth duplex, short, ~215 µm in length (1.6% of AL without canal), broad. Major limb broadly lanceolate, slightly curved. Accessory limb nearly twice as narrow, rather flat, ~0.8 of total tooth length, inserted into shallow but distinct socket on dorsal side of major limb. Radula of the second specimen is very similar, with still smaller marginal teeth, ~150 µm in length (1.9% of AL without canal).</p><p>DNA diagnosis (based on 4 cox 1 sequences)</p><p>‘C’ in site 121, ‘G’ in site 484, ‘G’ in site 520, ‘C’ in site 604.</p><p>Remarks</p><p>The best partition of the ASAP analysis combines L. farhatorum sp. nov. together with L. zucconi sp. nov. in a single PSH. Nevertheless, in the phylogenetic tree (Fig. 1, Supp. file 1) both species constitute monophyletic groups with high support that are not sister. Besides, they are rather distinct conchologically and have a slightly different shape of radular teeth. They both were found off the Solomon Is., although L. farhatorum is recorded at shallower depths. Therefore, we consider them as two independent species. The second-best ASAP partition recognized three PSHs, including two within L. farhatorum, which are nevertheless not monophyletic. Two specimens from Vanuatu (Fig. 4N–P) have a more slender shell with a less angulated shoulder. Radulae of specimens from Vanuatu and Solomon Is. are very similar and distinct from that of other species of Leucosyrinx in having relatively short and broad marginal teeth (Fig. 5B–C). The genetic distance between the two groups within L. farhatorum could be linked to geographic variation.</p><p>The largest specimen measures SL 42.7 mm. Both available specimens from the Solomon Is. (Fig. 4K– M) are similar in sculpture pattern and shell shape.</p><p>The new species somewhat resembles Sibogasyrinx pyramidalis, differing in a shorter canal, more pronounced axial folds on shoulder, absence of subsutural row of nodules. From the similar L. floraecharlottae sp. nov. it differs in having a straight vs slightly concave subsutural ramp, better pronounced spiral cords on the ramp, as well as in much shorter and relatively broader radular marginal teeth. It is somewhat similar to L. archibenthalis, differing in a broader shell with more pronounced sutural knobs and in broader and shorter marginal radular teeth.</p><p>Distribution</p><p>Solomon Is., Vanuatu, 637– 646 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFBE3D769061F9B3301D9936	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFA03D749059FC9433BD9925.text	03FCE539FFA03D749059FC9433BD9925.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx zucconi Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx zucconi sp. nov.</p><p>urn:lsid:zoobank.org:act: 6BB71F3B-B868-491C-A039-72810DAC1FB3</p><p>Figs 5D, 6</p><p>Etymology</p><p>The species is named after Dario Zuccon, member of the ERC “HYPERDIVERSE” team and long-term member of the MNHN team, as a recognition of his many years of indispensable efforts in sequence production.</p><p>Material examined</p><p>Holotype (sequenced) SOLOMON ISLANDS • Santa Isabel I.; 8°47′ N, 159°40′ E; depth 645–840 m; SALOMON 2, stn CP2181; MNHN-IM-2009-16820.</p><p>Other material (all sequenced)</p><p>SOLOMON ISLANDS • 1 lv; 7°28′ N, 156°14′ E; depth 1000–1050 m; SALOMON 2, stn CP2251; MNHN-IM-2009-13595 • 2 lv; 7°28′ N, 156°17′ E; depth 1059–1109 m; SALOMON 2, stn CP2252; MNHN-IM-2009-13574, MNHN-IM-2009-13575 • 1 lv; Santa Isabel I.; 8°47′ N, 159°38′ E; depth 762–1060 m; SALOMON 2, stn CP2182; MNHN-IM-2009-16765 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 71.9 mm, AL (with canal) 37.3 mm, AL (without canal) 23.0 mm, SW 25.4 mm.</p><p>SHELL (holotype). Large, fusiform, with a high spire, uniformly greyish in color, strong, with very thin greyish, tightly adhering smooth periostracum. 9+ teleoconch whorls, uppermost whorls and protoconch missing. Teleoconch whorls distinctly angled at shoulder, with weakly concave subsutural ramp. Shallow but distinct, impressed, slightly wavy suture. Teleoconch whorls, except last one with strong, oblique, medium broad, and rounded axial folds, absent on subsutural ramp, slightly weaken towards lower suture, 23 folds on penultimate and antepenultimate whorls. Folds fade at border between penultimate and last whorl. Last whorl shoulder distinctly angulated. Spiral sculpture of low, very narrow, but distinct strongly wavy cords over entire shell. 18 cords on subsutural ramp of last whorl and 20 of penultimate whorl. Numerous thin growth lines, also prominent on subsutural ramp. Shell base weakly evenly convex, smooth transition to long, straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal aperture. Inner lip slightly convex, nearly straight. Columellar and parietal sides with narrow, distinct callus. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 5D) (studied in holotype). Marginal teeth duplex, ~450 µm in length, relatively short (1.95% of AL without canal), medium broad. Major limb lanceolate in strict dorsal view, slightly curved. Accessory limb more than twice as narrow, ~0.8 of total tooth length, inserted into distinct and rather deep socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 2 cox 1 sequences)</p><p>‘C’ in site 14, ‘G’ in site 256, ‘T’ in site 499, ‘C’ in site 581, ‘C’ in site 586.</p><p>Remarks</p><p>The holotype is the largest specimen; the younger, nearly twice as small, has pagoda-like shape of the spire due to more distinct shoulder. The combination of the broad shell, pagodiform in younger specimens with more than 20 axial folds per whorl distinguish the species from other congeners.</p><p>Distribution</p><p>Solomon Is., 645–1059 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFA03D749059FC9433BD9925	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFA23D729050FC8933AD9E16.text	03FCE539FFA23D729050FC8933AD9E16.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx ringevali Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx ringevali sp. nov.</p><p>urn:lsid:zoobank.org:act: E4F3F151-D5AB-4B5D-9DAE-618156F6F3A4</p><p>Fig. 7A–H</p><p>Etymology</p><p>The species is named after Allan Ringeval, member of the ERC “HYPERDIVERSE” team, for his contribution to the knowledge of toxin diversity in neogastropods.</p><p>Material examined</p><p>Holotype (sequenced) MADAGASCAR • off Majunga; 15°25′ S, 45°55′ E; depth 943–950 m; MIRIKY, stn CP3253; MNHN-IM-2009-16916.</p><p>Other material (all sequenced)</p><p>MADAGASCAR • 2 lv; off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=45.95&amp;materialsCitation.latitude=-15.366667" title="Search Plazi for locations around (long 45.95/lat -15.366667)">Majunga</a> and <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=45.95&amp;materialsCitation.latitude=-15.366667" title="Search Plazi for locations around (long 45.95/lat -15.366667)">Cape Saint-André</a>; 15°22′ S, 45°57′ E; depth 780–1020 m; MIRIKY, stn CP3279; MNHN-IM-2007-36693, MNHN-IM-2009-16884 • 1 lv; same data as for holotype; MNHN-IM-2009-16919 .</p><p>Description</p><p>MEASUREMENTS (holotype, largest specimen). SL 34.2 mm, AL (with canal) 15.5 mm, AL (without canal) 10.4 mm, SW 10.2 mm.</p><p>SHELL (holotype). Medium-sized, narrow fusiform, with high spire, uniform light tan in color. Slightly over 10 teleoconch whorls. Paucispiral protoconch of about 2 rounded whorls, partially broken. Protoconch–teleoconch transition marked by appearance of axial folds. Teleoconch whorls strongly angled at shoulder, with distinctly concave subsutural ramp. Distinct shallow, impressed, and with wavy edge suture. 14 strong, oblique, broad, rounded axial folds on last whorl and 13 on penultimate whorl. Folds fade on sharply delimitated subsutural ramp, slightly weakening towards lower suture, disappear on whorl periphery. On last half of last whorl folds progressively weakening and not discernible near aperture. Intervals between the folds slightly exceed folds’ width. Medium- to well-developed spiral sculpture of rounded, narrow equally developed cords over entire shell, visible on axial folds and in interspaces between them. 8–9 on subsutural ramp of last and penultimate whorls. Numerous, thin growth lines, prominent on subsutural ramp. Shell base slightly convex, weakly curving, smooth transition to long and straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal. Inner lip nearly straight. Columellar and parietal sides with narrow, distinct callus. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA. Not examined.</p><p>DNA diagnosis (based on 4 cox 1 sequences)</p><p>‘C’ in site 290, ‘C’ in site 496, ‘C’ in site 544, ‘T’ in site 605.</p><p>Remarks</p><p>Although only four specimens are available, the species demonstrates a rather high variability in shell shape. The holotype is the largest and most slender specimen. The other specimens have broader shells with faster constricting shell base.</p><p>There is a certain similarity to Leucosyrinx madagascarensis, but the new species differs in a smaller shell and in a more delicate spiral sculpture. The new species is also similar to L. floraecharlottae sp. nov., differing in better pronounced spiral cords on the subsutural ramp and axial folds not extending to the ramp. Both species are not sister to L. ringevali sp. nov. in the phylogenetic tree.</p><p>Distribution</p><p>Madagascar, 780– 943 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFA23D729050FC8933AD9E16	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFA43D739000FBF433AD9EE5.text	03FCE539FFA43D739000FBF433AD9EE5.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx vanweddingenae Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx vanweddingenae sp. nov.</p><p>urn:lsid:zoobank.org:act: F4AD5344-967D-4CC8-A0FA-58341D58195A</p><p>Fig. 7I–M</p><p>Etymology</p><p>The species is named after Mélanie van Weddingen, member of the ERC “HYPERDIVERSE” team, for her contribution to the management of the neogastropod collection of the MNHN.</p><p>Material examined</p><p>Holotype (sequenced) SOUTH MADAGASCAR • 1 lv; 25°43′ S, 44°24′ E; depth 729–732 m; ATIMO VATAE, stn CP3597; MNHN-IM-2009-14918.</p><p>Other material (sequenced)</p><p>MADAGASCAR • 1 lv; off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=45.966667&amp;materialsCitation.latitude=-15.366667" title="Search Plazi for locations around (long 45.966667/lat -15.366667)">Majunga</a>; 15°22′ S, 45°58′ E; depth 650–850 m; MIRIKY, stn CP3252; MNHN-IM-2009-16909 .</p><p>Description</p><p>MEASUREMENTS (holotype, largest specimen). SL 27.1 mm, AL (with canal) 12.5 mm, AL (without canal) 8.5 mm, SW 9.3 mm.</p><p>SHELL (holotype). Small, narrow fusiform, with high spire, rather strong, uniformly off white. 8.5 teleoconch whorls. Paucispiral, bulbous, light tan protoconch, of about 1.75 rounded whorls. Protoconch–teleoconch transition indistinct, marked by appearance of shoulder keel. Teleoconch whorls markedly angled at shoulder, with distinctly concave subsutural ramp. Distinct, shallow, impressed suture. 15 strong, weakly oblique, broad, rounded axial folds on last whorl and 14 on penultimate whorl, with intervals slightly broader than folds. Folds fade on sharply delimitated subsutural ramp, slightly weaken towards lower suture, folds disappear on last whorl periphery. Very weak spiral sculpture of rounded, narrow, equally developed cords on periphery of last whorl and shell base, indiscernible on subsutural ramp, around 20 on periphery, shell base and canal. Intervals between cords uneven, 1–3 times cords’ width. Numerous weak, thin growth lines. Shell base slightly convex, weakly curving, smooth transition to medium long and straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal. Inner lip nearly straight. Columellar and parietal sides with narrow, distinct callus. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA. Not examined.</p><p>DNA diagnosis (based on 2 cox 1 sequences)</p><p>‘T’ in site 74, ‘A’ in site 346, ‘A’ in site 508, ‘C’ in site 640.</p><p>Remarks</p><p>Only two specimens are available. The second specimen (MNHN-IM-2009-16909) is similar to the holotype, but the axial folds disappear in the last half of the last whorl. The subsutural ramp has indistinct spiral striation.</p><p>The species is very similar to L. ringevali sp. nov., which was collected in close proximity at similar depths, but differs in a much weaker spiral sculpture, which in L. ringevali consists of much more numerous, distinct and uniformly closely spaced cords. Besides, according to the phylogenetic tree, the species are not closely related. There is a certain similarity to L. derzellei sp. nov., but the new species differs in a smaller and paler shell and in much weaker spiral sculpture.</p><p>Distribution</p><p>Madagascar, 650– 729 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFA43D739000FBF433AD9EE5	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFA53D709046FAC930B69C04.text	03FCE539FFA53D709046FAC930B69C04.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx rattiae Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx rattiae sp. nov.</p><p>urn:lsid:zoobank.org:act: DCD2473D-D65A-4149-84E4-2D059261382A</p><p>Figs 5E, 7N–R</p><p>Leucosyrinx sp. D – Kantor &amp; Puillandre 2021: fig. 13f.</p><p>Etymology</p><p>The species is named after Claudia Ratti, member of the ERC “HYPERDIVERSE” team, for her contribution to the management of the neogastropod collection of the MNHN.</p><p>Material examined</p><p>Holotype (sequenced) SOLOMON ISLANDS • NW Santa Isabel I.; 7°49′ S, 157°41′ E; depth 1045–1118 m; SALOMON 2, stn CP2217; MNHN-IM-2009-16769.</p><p>Other material (all sequenced)</p><p>SOLOMON ISLANDS • 2 lv; same data as for holotype; MNHN-IM-2009-16767, MNHN-IM-2009-16768 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 24.9 mm, AL (with canal) 13.0 mm, AL (without canal) 8.4 mm, SW 9.7 mm.</p><p>SHELL (holotype). Small, fusiform, nearly biconic, with medium high spire, uniformly light tan in color, fragile. About 8 teleoconch whorls. Paucispiral, smooth, eroded protoconch of less than 1.5 whorls. Teleoconch whorls roundly angled at the shoulder, with a distinctly concave subsutural ramp. Distinct, shallow, impressed, suture with wavy edge. 15 strong, oblique, broad, rounded axial folds on last and penultimate whorls. Folds fade on sharply delimitated subsutural ramp, extending without weakening towards lower suture, disappear on whorl periphery. Folds well-developed on all whorls, intervals between folds slightly broader than folds. Medium- to well-developed spiral sculpture of rounded, narrow equally developed cords over entire shell, including axial folds and interspaces between them. Cords pronounced on subsutural ramp, 5–6 on last and penultimate whorls. Numerous thin, prominent on the subsutural ramp growth lines. Shell base slightly convex, weakly curving, smooth transition to medium long and straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal. Inner lip nearly straight. Columellar and parietal sides with narrow, distinct callus. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 5E; studied in MNHN-IM-2009-16768). Marginal teeth duplex, ~230 µm in length, relatively short (3.7% of AL without canal), rather broad and short. Major limb broadly lanceolate in dorsal view, curved. Accessory limb more than twice as narrow, ~0.75 of total tooth length, inserted into distinct deep socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 2 cox 1 sequences)</p><p>‘T’ in site 307, ‘G’ in site 325, ‘C’ in site 460.</p><p>Remarks</p><p>The largest second specimen measures SL 28.7 mm, with a relatively longer siphonal canal.</p><p>In shell outline the new species resembles several species, particularly L. farhatorum sp. nov. and L. ringevali sp. nov., none being closely related according to the phylogenetic tree. Another similar species is L. herosae sp. nov., from which it differs by the much smaller size and a relatively lower spire.</p><p>Distribution</p><p>The species is known only from the type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFA53D709046FAC930B69C04	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFA63D7E905DF9EA31299DCB.text	03FCE539FFA63D7E905DF9EA31299DCB.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx derzellei Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx derzellei sp. nov.</p><p>urn:lsid:zoobank.org:act: A6BBDEE8-3B6A-4DBC-A96A-038324A0E155</p><p>Figs 5F, 8A–F</p><p>Etymology</p><p>The species is named after Alessandro Derzelle, member of the ERC “HYPERDIVERSE” team, for his contribution to the analysis of neogastropod genomes.</p><p>Material examined</p><p>Holotype (sequenced) SOUTH MADAGASCAR • 25°43′ S, 44°24′ E; depth 729–732 m; ATIMO VATAE, stn CP3597; MNHN-IM-2009-14986.</p><p>Other material (all sequenced)</p><p>NORTH-WESTERN MADAGASCAR • 1 lv; off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=45.916668&amp;materialsCitation.latitude=-15.416667" title="Search Plazi for locations around (long 45.916668/lat -15.416667)">Majunga</a>; 15°25′ S, 45°55′ E; depth 943–950 m; MIRIKY, stn CP3253; MNHN-IM-2009-16918 .</p><p>SOUTH MADAGASCAR • 2 lv; 25°35′ S, 44°15′ E; depth 821–910 m; ATIMO VATAE, stn CP3595; MNHN-IM-2009-14814, MNHN-IM-2009-14833 • 3 lv; same data as for holotype; MNHN-IM-2009-14817, MNHN-IM-2009-14819, MNHN-IM-2009-14984 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 33.3 mm, AL (with canal) 13.2 mm, AL (without canal) 8.6 mm, SW 10.5 mm.</p><p>SHELL (holotype). Shell medium-sized, thin, fusiform, with high spire, tan in color, with slightly darker band on shoulder and lighter shell base and canal. Slightly over 10 teleoconch whorls. Paucispiral, of about 1.75 evenly rounded and microshagreened whorls protoconch. Protoconch-teleoconch transition indistinct, marked by emergence of shoulder keel, smooth initially but soon acquiring axial folds. Teleoconch whorls roundly angled at shoulder, with distinctly concave subsutural ramp. Shallow, impressed, and slightly wavy suture. 14 strong, oblique, broad, and rounded axial folds on shoulder of last whorl and 13 on penultimate whorl. Folds fade on subsutural ramp, strongly weaken towards lower suture, rapidly disappear on whorl periphery. Folds more closely spaced on five upper teleoconch whorls, on last whorl intervals between folds slightly broader than folds. Relatively distinct spiral sculpture is of low, rounded, and narrow cords over entire shell. On subsutural ramp and shoulder cords more closely spaced, with intervals narrower than cords themselves, broader spaced on shell base and canal, with intervals exceeding width of cords. Numerous thin, prominent on subsutural ramp growth lines. Shell base weakly curving, smooth transition to long and straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal. Inner lip slightly convex. Columellar and parietal sides with narrow, distinct callus, slightly lighter than remaining part of last whorl. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip. Lower margin of the sinus parallel to shoulder.</p><p>RADULA (Fig. 5F; studied in MNHN-IM-2009-14833). Radula short, comprises around 25 rows of teeth, 8 nascent. Marginal teeth duplex, ~310 µm (2.6 % AL without canal). Major limb narrow lanceolate in dorsal view, curved. Accessory limb relatively broad, constitutes half of tooth width, ~0.75 of total tooth length, inserted into distinct deep socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 7 cox 1 sequences)</p><p>‘G’ in site 49, ‘A’ in site 307, ‘G’ in site 382, ‘A’ in site 554.</p><p>Remarks</p><p>The species is moderately variable in shell shape, length of the canal and degree of development of the axial folds.</p><p>It is most similar to sympatric Leucosyrinx legalli sp. nov., differing in a relatively shorter canal and a higher spire. It is also very close to Leucosyrinx sp. 15 from the Philippines. None of the similar species is phylogenetically closely related to L. derzellei sp. nov.</p><p>There is a certain similarity with Leucosyrinx melvilli (Schepman, 1913) from 918 m in Indonesia. The new species differs in a smaller size (35.8 vs 62 mm), less numerous axial folds (14 vs 22 on the last whorl) and a more angular shoulder. From sympatric L. madagascarensis, the new species differs in a slenderer shell with a less bulging shoulder as well as in less pronounced and more numerous spiral cords.</p><p>Distribution</p><p>From north-western to southern Madagascar, 729– 943 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFA63D7E905DF9EA31299DCB	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFA93D7C9040FECA30DC9B54.text	03FCE539FFA93D7C9040FECA30DC9B54.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx legalli Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx legalli sp. nov.</p><p>urn:lsid:zoobank.org:act: 588504FF-AD5E-42F3-9D3C-925CF7729B2C</p><p>Figs 5G–H, 8G–K</p><p>Etymology</p><p>The species is named after Michel Le Gall, an indespensible volunteer companion of many years of the MNHN expeditions.</p><p>Material examined</p><p>Holotype (sequenced) MADAGASCAR • off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=45.916668&amp;materialsCitation.latitude=-15.416667" title="Search Plazi for locations around (long 45.916668/lat -15.416667)">Majunga</a>; 15°25′ S, 45°55′ E; depth 943–950 m; MIRIKY, stn CP3253; MNHN-IM-2009-16915.</p><p>Other material (sequenced)</p><p>MADAGASCAR • 1 lv; off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=45.966667&amp;materialsCitation.latitude=-15.366667" title="Search Plazi for locations around (long 45.966667/lat -15.366667)">Majunga</a>; 15°22′ S, 45°58′ E; depth 650–850 m; MIRIKY, stn CP3252; MNHN-IM-2009-16912 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 30.2 mm, AL (with canal) 14.1 mm, AL (without canal) 8.5 mm, SW 9.0 mm.</p><p>SHELL (holotype). Medium-sized, thin, fusiform, slender, with high spire, uniformly light tan in color. 9.75 weakly roundly angled at shoulder teleoconch whorls, with slightly concave subsutural ramp. Paucispiral protoconch of about 1.5 evenly rounded whorls. Protoconch and first teleoconch whorls eroded, protoconch–teleoconch transition indistinct. Very shallow, impressed, and slightly wavy suture. 13 weak, oblique, narrow, and rounded axial folds on shoulder of last whorl and 13 on penultimate whorl. Folds fade on subsutural ramp, hardly reach lower suture on penultimate whorl, hardly discernible below shoulder of last whorl. Folds better pronounced and closer spaced on upper whorls, with intervals of about same width as folds, on penultimate and last whorls intervals about twice as broad than folds. Medium distinct spiral sculpture of low, rounded, and narrow cords over entire shell, 6–7 cords on subsutural ramp of last and penultimate whorls, on upper whorls subsutural ramp smooth. Numerous thin, prominent on subsutural ramp growth lines. Shell base weakly curving, smooth transition to long, straight rather broad canal. canal. Narrow, elongate-oval aperture, poorly differentiated from canal, outer lip broken. Inner lip slightly convex. Columellar and parietal sides with narrow, distinct callus, slightly lighter than remaining part of last whorl. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 5G–H; examined in MNHN-IM-2009-16912). Marginal teeth duplex, ~240 µm (3.0% AL without canal). Major limb lanceolate in dorsal view, weakly curved, with sharp cutting edges of tip (Fig. 5G). Accessory limb constitutes about half of tooth width, ~0.75 of total tooth length, inserted into very shallow socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 2 cox 1 sequences)</p><p>‘A’ in site 202, ‘G’ in site 355, ‘C’ in site 359, ‘T’ in site 478.</p><p>Remarks</p><p>The species is sympatric at one station with L. derzellei sp. nov. and is morphologically most close to it (but not phylogenetically). It differs in less angular whorls, a slenderer shell and a relatively taller last whorl.</p><p>Distribution</p><p>North-western Madagascar, 650– 943 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFA93D7C9040FECA30DC9B54	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFAA3D7A906CFB75313E9FD9.text	03FCE539FFAA3D7A906CFB75313E9FD9.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx schepmani Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx schepmani sp. nov.</p><p>urn:lsid:zoobank.org:act: AF034A13-FDE2-4EEF-9F40-FF30BF35D7DA</p><p>Fig. 9A–F</p><p>Etymology</p><p>The species is named after Mattheus Marinus Schepman, famous Dutch malacologist for his contribution to the study of deep-water gastropods, including Conidae, who described several species of Leucosyrinx .</p><p>Material examined</p><p>Holotype (sequenced) SOLOMON ISLANDS • Santa Isabel I.; 8°47′ N, 159°38′ E; depth 762–1060 m; SALOMON 2, stn CP2182; MNHN-IM-2009-16761.</p><p>Other material (all sequenced)</p><p>PAPUA NEW GUINEA • 1 lv; New Ireland; 2°42′ S, 150°02′ E; depth 827–966 m; KAVIENG 2014, stn CP4483; MNHN-IM-2013-58844 .</p><p>PHILIPPINES • 2 lv; Luzon I.; 15°45′ N, 121°45′ E; depth 562 m; AURORA 2007, stn CP2663; MNHN-IM-2009-13432, IM-2009-13433 • 1 lv; Luzon I.; 15°53′ N, 121°54′ E; depth 518–538 m; AURORA 2007, stn CP2750; MNHN-IM-2009-13464 .</p><p>SOLOMON SEA • 1 lv; Induna I.; 4°35′ S, 152°25′ E; depth 575–616 m; MADEEP, stn CP44266; MNHN-IM-2013-45461 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 33.0 mm, AL (with canal) 14.4 mm, AL (without canal) 10.0 mm, SW 9.8 mm.</p><p>SHELL (holotype). Shell medium-sized, thin, elongate fusiform, slender, with high spire, uniformly light tan in color. 9.75 distinctly roundly angled at shoulder teleoconch whorls, with slightly concave, nearly straight subsutural ramp. Paucispiral protoconch of about 1.5 evenly rounded bulbous whorls, light brown. Posterior part of protoconch and first teleoconch whorl eroded protoconch–teleoconch transition indistinct is indistinct. Shallow, impressed suture. 12 distinct, oblique, narrow, and rounded axial folds on shoulder of last whorl and 12 on penultimate whorl. Folds fade on subsutural ramp, hardly reach lower suture on penultimate whorl, equally pronounced on all teleoconch whorls. Very weak spiral sculpture of low, rounded, and narrow cords, with interspaces exceeding cords width, absent on subsutural ramp, visible below shoulder. Numerous thin, prominent on subsutural ramp growth lines. Shell base weakly curving, smooth transition to long, straight rather broad canal. Narrow, elongate-oval aperture, poorly differentiated from canal, outer lip fragile, partially broken. Inner lip slightly concave, nearly straight. Columellar and parietal sides with narrow, distinct callus, of same color as the remaining part of last whorl. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA. Not examined.</p><p>DNA diagnosis (based on 6 cox 1 sequences)</p><p>‘C’ in site 250, ‘C’ in site 463, ‘A’ in site 508.</p><p>Remarks</p><p>The other studied specimens are generally rather similar to the holotype in shape and sculpture pattern. The most variable character is the convexity of the last whorl. Spiral sculpture is more variable and some specimens have rather distinct spiral cords, visible even on subsutural ramp (e.g., in MNHN-IM-2009-13432 from the Philippines – Fig. 9F).</p><p>The species is very similar, hardly distinguishable conchologically from L. oliverioi sp. nov., but they are not sister species.</p><p>Distribution</p><p>Philippines, Solomon Sea, Papua New Guinea, 518– 827 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFAA3D7A906CFB75313E9FD9	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFAC3D7B905CF9C5310F9DB8.text	03FCE539FFAC3D7B905CF9C5310F9DB8.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx oliverioi Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx oliverioi sp. nov.</p><p>urn:lsid:zoobank.org:act: A5E2AB47-6BEB-4DB7-A66F-8A24EE96FA18</p><p>Figs 9G–L, 10A</p><p>Etymology</p><p>The species is named after Marco Oliverio (Sapienza University of Rome, Italy), world known specialist in phylogeny and taxonomy of molluscs and our companion of many years in expeditions organized by MNHN.</p><p>Material examined</p><p>Holotype (sequenced) SOLOMON ISLANDS • NW Santa Isabel I.; 7°45′ S, 157°38′ E; depth 930–977 m; SALOMON 2, stn CP2216; MNHN-IM-2007-17928.</p><p>Other material (all sequenced)</p><p>PAPUA NEW GUINEA • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=150.75&amp;materialsCitation.latitude=-5.35" title="Search Plazi for locations around (long 150.75/lat -5.35)">Kimbe Bay</a>; 5°21′ S, 150°45′ E; depth 490–715 m; BIOPAPUA, stn CP3679; MNHN-IM-2009-17078 .</p><p>SOLOMON ISLANDS • 1 lv; Guadalcanal; 9°25′ N, 160°32′ E; depth 537–619 m; SALOMONBOA 3, stn CP2773; MNHN-IM-2009-6103 • 1 lv; E of Malaita; 8°41′ N, 161°04′ E; depth 556–864 m; SALOMONBOA 3, stn CP2800; MNHN-IM-2009-18960 .</p><p>VANUATU • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=166.93333&amp;materialsCitation.latitude=14.916667" title="Search Plazi for locations around (long 166.93333/lat 14.916667)">Big Bay</a>; 14°55′ N, 166°56′ E; depth 667–750 m; BOA1, stn CP2422; MNHN-IM-2007-17690 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 37.5 mm, AL (with canal) 18.6 mm, AL (without canal) 12.8 mm, SW 12.9 mm.</p><p>SHELL (holotype). Shell medium-sized, broad fusiform, with high spire, uniformly light yellow in color, thin. Nearly 10 distinctly roundly angled at shoulder teleoconch whorls, with slightly concave, nearly straight subsutural ramp. Paucispiral protoconch of about 1.5 evenly rounded strongly convex whorls, tan. Distinct slightly adpressed suture. 13 distinct, strong oblique, and rounded axial folds on shoulder of penultimate whorl and 12 on antepenultimate whorl. On last whorl folds present only on apertural side, disappear on dorsal side. Folds fade on subsutural ramp, hardly reach lower suture on penultimate whorl, equally pronounced on all teleoconch whorls except last one. Weak spiral sculpture, hardly discernible on subsutural ramp, below shoulder of very weak, low, rounded, wavy cords, with interspaces narrower than cords’ width. Numerous thin, prominent on subsutural ramp growth lines. Shell base moderately curving, smooth transition to long, straight rather broad canal. Narrow, elongate-oval aperture, poorly differentiated from canal, outer lip fragile, partially broken. Inner lip is slightly concave, nearly straight. Columellar and parietal sides with narrow, distinct callus, of same color as remaining part of last whorl. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 10A; studied in holotype). Short, comprises around 30 rows of teeth, 8–9 nascent. Marginal teeth duplex, ~470 µm in length (3.7% AL without canal). Major limb narrow lanceolate in dorsal view, curved. Accessory limb relatively broad, constitutes slightly over half of tooth width, ~0.8 of total tooth length, inserted into distinct deep socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 5 cox 1 sequences)</p><p>‘C’ in site 281, ‘T’ in site 364, ‘G’ in site 559.</p><p>Remarks</p><p>The holotype has a broader shell than other studied specimens, so that intraspecific variability exceeds interspecific when comparing the species with L. schepmani sp. nov. The axial folds are weaker or absent on the posterior part of the last whorl in all specimens. The spiral cords are very weak below the shoulder, but better pronounced on the shell base and canal.</p><p>The species is very similar, hardly distinguishable conchologically from L. schepmani sp. nov., and no clear morphological gap was found.</p><p>Distribution</p><p>Vanuatu, Solomon Is., Papua New Guinea, 490– 930 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFAC3D7B905CF9C5310F9DB8	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFAF3D47901EFC1E33E69C83.text	03FCE539FFAF3D47901EFC1E33E69C83.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx claviforma (Kosuge 1992)	<div><p>Leucosyrinx claviforma (Kosuge, 1992)</p><p>Figs 10B–C, 12A–F</p><p>Comitas claviforma Kosuge, 1992: 165, pl. 58 figs 7–8.</p><p>Leucosyrinx claviforma – Sysoev 1996: 11, fig. 28.</p><p>Type material</p><p>Holotype WESTERN AUSTRALIA • off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=118.416664&amp;materialsCitation.latitude=-17.966667" title="Search Plazi for locations around (long 118.416664/lat -17.966667)">Port Hedland</a>, 17°58′ S, 118°25′ E; depth 376 m; WAM 45-86.</p><p>Material examined (all sequenced)</p><p>BISMARCK SEA • 1 lv; N Bagabag Is; 4°45′ S, 146°12′ E; depth 456–582 m; PAPUA NIUGINI, stn CP3978; MNHN-IM-2013-9614 .</p><p>PAPUA NEW GUINEA • 1 lv; Woodlark Is.; 9°07′ S, 152°14′ E; depth 473–491 m; BIOPAPUA, stn DW3738; MNHN-IM-2009-17180 • 1 lv; submarine mountains off Bougainville; 5°33′ S, 154°00′ E; depth 369–377 m; BIOPAPUA, stn DW3745; MNHN-IM-2013-52048 • 1 lv; New Ireland; 2°23′ S, 150°37′ E; depth 416–535 m; KAVIENG 2014, stn CP4437; MNHN-IM-2013-58303 • 2 lv; New Ireland; 2°15′ S, 150°14′ E; depth 450–474 m; KAVIENG 2014, stn CP4446; MNHN-IM-2013-58380, MNHN-IM-2013-58382 .</p><p>SOLOMON SEA • 2 lv; SE of Tuam Is; 6°04′ S, 148°09′ E; depth 460–528 m; PAPUA NIUGINI, stn CP4007; MNHN-IM-2013-9729, MNHN-IM-2013-9731 • 1 lv; SE of Tuam Is; 6°04′ S, 148°10′ E; depth 500–555 m; PAPUA NIUGINI, stn CP4008; MNHN-IM-2013-9725 • 3 lv; SE of Tuam Is; 6°04′ S, 148°12′ E; depth 500–575 m; PAPUA NIUGINI, stn CP4009; MNHN-IM-2013-19932, MNHN-IM-2013-19934, MNHN-IM-2013-9730 .</p><p>Description</p><p>SHELL. Medium sized, reaching 38+ mm, thin but solid, narrow fusiform, with very high spire, light yellowish in color. Paucispiral small protoconch of nearly 2 convex evenly rounded smooth whorls. Whorls distinctly angulated on shoulder, with distinctly concave subsutural ramp, last whorl can be weakly roundly angular at transition to shell base. Shallow and impressed suture. Strong, oblique, broad, and rounded axial folds on shoulder of teleoconch whorls. Folds fade on subsutural ramp, strongly weaken towards lower suture, disappear shortly below shoulder on last whorl. Number of folds per whorl increasing with shell size, 17–18 on last whorl. Rather distinct spiral sculpture of closely spaced, low, rounded, straight on subsutural ramp and wavy below suture cords over entire shell. Shell base strong to weakly convex, smooth transition to long, straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 10B–C; studied in two specimens, MNHN-IM-2013-58303 and MNHN-IM-2013-52048). Short, comprises around 25 rows of teeth, 8–9 nascent. Morphologically similar in both specimens. Marginal teeth duplex, relatively long, ~205–290 µm (4.8–6.2% AL without canal). Major limb medium narrow lanceolate in dorsal view, curved. Accessory limb narrow, constitutes less than half of tooth width, ~0.8 of total tooth length, inserted into distinct medium deep socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 12 cox 1 sequences)</p><p>‘C’ in site 70, ‘G’ in site 97, ‘C’ in site 139, ‘C’ in site 586.</p><p>Remarks</p><p>The species was described based on a single dead-collected and strongly worn shell (Fig. 12A), lacking protoconch and upper teleoconch whorls with SL 38.1 mm. Sequenced specimens at our disposal originated from Papua New Guinea and the Solomon and Bismarck seas from depths of 370– 500 m. Although our specimens are significantly smaller (reaching 24.3 mm vs 38.1 mm in the holotype), conchologically they are rather similar to the holotype in a characteristic narrow fusiform shell with a very high spire and a prominent angulation of the shoulder. The shell shape and prominence of the axial folds are moderately variable in the species. Our examined specimens with SL 19–24 mm were already adults judging from their fully developed very long penises.</p><p>Another similar species is Leucosyrinx granuloplicata (Kosuge, 1992), also from Western Australia at depths of 276– 497 m. It differs in more pronounced and broader spaced folds on the whorl shoulders (Fig. 12G). Since the variability of L. granuloplicata is not known, it is not possible to decide whether it is an extreme form of L. claviforma, or a distinct species. Presently, we consider it as a valid species.</p><p>Distribution</p><p>Western Australia, Maldive Is. (Sysoev 1996), Papua New Guinea, Solomon and Bismarck seas (this study), 376–1170 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFAF3D47901EFC1E33E69C83	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF933D429046FD9130739E35.text	03FCE539FF933D429046FD9130739E35.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx gaelae Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx gaelae sp. nov.</p><p>urn:lsid:zoobank.org:act: 6C0EDDB0-1001-4E86-BE55-1A86D875D745</p><p>Fig. 12I–M</p><p>Etymology</p><p>The species is named after Priscillia Gaël Bourguignon, member of the marine invertebrate team in the MNHN.</p><p>Material examined</p><p>Holotype (sequenced) PAPUA NEW GUINEA • New Britain, north of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=151.83333&amp;materialsCitation.latitude=-4.0666666" title="Search Plazi for locations around (long 151.83333/lat -4.0666666)">Rabaul</a>; 4°4′ S, 151°50′ E; depth 702–724 m; BIOPAPUA, stn CP3672; MNHN-IM-2009-17135.</p><p>Other material (all sequenced)</p><p>PAPUA NEW GUINEA • 3 lv; New Britain, north of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=151.83333&amp;materialsCitation.latitude=-4.05" title="Search Plazi for locations around (long 151.83333/lat -4.05)">Rabaul</a>; 4°3′ S, 151°50′ E; depth 788–805 m; BIOPAPUA, stn CP3674; MNHN-IM-2009-16996, MNHN-IM-2009-16997, MNHN-IM-2009-17001 • 2 lv; same data as for holotype; IM-2009-17138, IM-2009-17211 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 21.9 mm, AL (with canal) 9.46 mm, AL (without canal) 6.3 mm, SW 6.4 mm.</p><p>SHELL (holotype). Shell small, narrow fusiform, with high spire, very light tan in color, thin, semitransparent, fragile. 8.5 distinctly roundly angulated at shoulder teleoconch whorls. Upper part of protoconch missing. Subsutural ramp weakly concave on upper whorls, nearly straight on last and penultimate whorls. Shallow and impressed suture. Strong, oblique, broad, and rounded axial folds on shoulder of teleoconch whorls, forming nearly orthocline knobs, increasing in number from 9–10 on first whorl to 12 on penultimate and last whorls. Folds fade on subsutural ramp, do not reach lower suture, disappear below shoulder on last whorl. Weak, hardly discernible spiral sculpture of closely spaced, low, rounded cords over entire shell except subsutural ramp. Intervals between cords narrower than cords’ width. Numerous thin, visible on subsutural ramp growth lines. Shell base weakly convex, passes smoothly into long and straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal, outer lip fragile, partially broken. Inner lip is nearly straight, outer lip very thin and fragile. Columellar and parietal sides with narrow, distinct callus, of same color as remaining part of last whorl. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA. Not examined.</p><p>DNA diagnosis (based on 6 cox 1 sequences)</p><p>‘A’ in site 163, ‘G’ in site 169, ‘C’ in site 448, ‘C’ in site 548.</p><p>Remarks</p><p>The protoconch, retained in one specimen (MNHN-IM-2009-16997), is paucispiral, of about 1.75 strongly convex whorls, light brown. The transition between the protoconch and teleoconch is marked by the emergence of a shoulder keel.</p><p>The species is weakly variable. Most of the shells are partially broken due to the fragility. The number of knobs on the last whorl can reach 14–15. The species is most similar to L. claviforma and to Leucosyrinx sp. 12, differing in broader spaced axial folds, more like knobs, on the shoulder and a relatively lower spire.</p><p>There is a certain similarity in shell outline to Sibogasyrinx suluensis (Powell, 1969), differing in less pronounced and more closely spaced spiral cords below the shoulder on the last whorl, as well as in the absence of a subsutural row of knobs.</p><p>The specimen presented by Sysoev (1996: 11, fig. 28) as Leucosyrinx claviforma off Maldive Is. from depths of 786–1170 m may belong to L. gaelae sp. nov., which is found at greater depths than L. claviforma – 702–788 vs 370– 500 m.</p><p>Distribution</p><p>Papua New Guinea, 702– 788 m.</p></div>	https://treatment.plazi.org/id/03FCE539FF933D429046FD9130739E35	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF943D40905DFB99309E9F40.text	03FCE539FF943D40905DFB99309E9F40.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx urbanae Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx urbanae sp. nov.</p><p>urn:lsid:zoobank.org:act: F3094F19-FFC7-46AF-9DBA-9B9E0EAFD084</p><p>Figs 10D–E, 13A–D</p><p>Etymology</p><p>The species is named after Danièle Urban-Dehoux, a volunteer of many years of the malacological team of the MNHN.</p><p>Material examined</p><p>Holotype (sequenced) SOLOMON ISLANDS • E of Malaita; 8°41′ N, 161°04′ E; depth 556–864 m; SALOMONBOA 3, stn CP2800; MNHN-IM-2009-18962.</p><p>Other material (all sequenced)</p><p>PAPUA NEW GUINEA • 1 lv; East of Manus I.; 2°11′ S, 147°18′ E; depth 499–517 m; BIOPAPUA, stn CP3691; MNHN-IM-2009-17215 .</p><p>SOLOMON ISLANDS • 1 lv; NW Santa Isabel I.; 7°42′ S, 157°44′ E; depth 550–682 m; SALOMON 2, stn CP2214; MNHN-IM-2007-42510 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 14.2 mm, AL (with canal) 7.6 mm, AL (without canal) 4.0 mm, SW 4.0 mm.</p><p>SHELL (holotype). Shell small, narrow fusiform, with moderately high spire, very light tan in color, thin, semitransparent, fragile. 7.5 teleoconch whorls with distinctly angular rounded shoulder and weakly concave subsutural ramp. Paucispiral, small protoconch of about 1.75 convex evenly rounded whorls, light brownish, protoconch–teleoconch transition indiscernible due to shell erosion. Shallow, impressed suture. Strong, oblique, narrow, and rounded axial folds on shoulder of teleoconch whorls, increasing in number from 9 on first whorl to 11 on penultimate and 12 on last whorls. Folds fade on subsutural ramp, reach lower suture on upper whorls, disappear below shoulder on last whorl. On posterior half of last whorl folds progrwessively weaken, although still visible.Very weak spiral sculpture, hardly discernible on subsutural ramp and below shoulder on last whorl, of irregularly spaced low cords, slightly better pronounced on transition to canal. Numerous thin, visible on subsutural ramp growth lines. Shell base weakly convex, smooth transition to long and straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal, inner lip nearly straight, outer lip very thin and fragile. Columellar and parietal sides with narrow, distinct callus, of same color as remaining part of last whorl. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 10D–E; studied in MNHN-IM-2009-17215). Marginal teeth duplex, ~190 µm in length (5.1% AL without canal). Major limb lanceolate in dorsal view, curved. Accessory limb relatively broad, at tooth base equals total tooth width, ~0.75 of total tooth length, inserted into distinct deep socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 3 cox 1 sequences)</p><p>‘C’ in site 43, ‘T’ in site 412, ‘C’ in site 541.</p><p>Remarks</p><p>The two other specimens are similar to the holotype in shell outline and axial sculpture. The specimen MNHN-IM-2009-17215 (Fig. 13D) has a much better pronounced spiral sculture of closely spaced rounded cords, visible also on the subsutural ramp.</p><p>Conchologically it is similar to Leucosyrinx sp. 23 and, particularly, to L. gaelae sp. nov, differing in their smaller size and a longer siphonal canal, but they are phylogenetically not closely related.</p><p>Distribution</p><p>Solomon Is., Papua New Guinea, 499– 556 m.</p></div>	https://treatment.plazi.org/id/03FCE539FF943D40905DFB99309E9F40	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF983D4E909AFE1530479F31.text	03FCE539FF983D4E909AFE1530479F31.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx undefined-8	<div><p>Leucosyrinx sp. 8</p><p>Figs 10H, 13J–K</p><p>Material examined (sequenced)</p><p>SOUTHERN NEW CALEDONIA • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=167.41667&amp;materialsCitation.latitude=22.45" title="Search Plazi for locations around (long 167.41667/lat 22.45)">Pass de la Sarcelle</a>, 22°27′ N, 167°25′ E; depth 470–570 m; TERRASSES, stn DW3083; MNHN-IM-2009-29323 .</p><p>Description</p><p>RADULA (Fig. 10H). Marginal teeth duplex, ~240 µm in length (4.6% AL without canal). Major limb medium broad, lanceolate in dorsal view, curved. Accessory limb constitutes slightly over half of tooth width, ~0.75 of total tooth length, inserted into distinct deep socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 1 (!) cox 1 sequence)</p><p>‘C’ in site 286, ‘C’ in site 428, ‘C’ in site 436.</p><p>Remarks</p><p>This medium-sized (SL 20.1 mm) species is represented by a single specimen. Since the variability is unknown, we abstain from a formal description of the new species.</p><p>It is similar to Leucosyrinx sp. 22 (Fig. 13G–I), also from southern New Caledonia, although the phylogenetic tree demonstrates that they are not closely related. Conchologically it differs in a much better developed spiral sculpture of irregularly and broadly-spaced spiral cords.</p><p>Distribution</p><p>New Caledonia, 470– 570 m.</p></div>	https://treatment.plazi.org/id/03FCE539FF983D4E909AFE1530479F31	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF983D4F905CFA9F31DF9C89.text	03FCE539FF983D4F905CFA9F31DF9C89.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx boiteuxi Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx boiteuxi sp. nov.</p><p>urn:lsid:zoobank.org:act: 0CFCDF0C-8C7F-4990-AA08-C8413E768752</p><p>Figs 10I, 14A–D</p><p>Etymology</p><p>The species is named after Benoit Boiteux, a indespensible volunteer companion of many years of the MNHN expeditions.</p><p>Material examined</p><p>Holotype (sequenced) BISMARCK SEA • NW Long I.; 5°12′ S, 146°59′ E; depth 470–508 m; PAPUA NIUGINI, stn DW3983; MNHN-IM-2013-19767.</p><p>Other material (all sequenced)</p><p>PAPUA NEW GUINEA • 1 lv; off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=145.86667&amp;materialsCitation.latitude=-4.9666667" title="Search Plazi for locations around (long 145.86667/lat -4.9666667)">Madang</a>; 4°58′ S, 145°52′ E; depth 640–675 m; BIOPAPUA, stn CP3709; MNHN-IM-2013-52051 .</p><p>SOLOMON SEA • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=147.6&amp;materialsCitation.latitude=-6.0" title="Search Plazi for locations around (long 147.6/lat -6.0)">Vityaz Strait</a>; 6°00′ S, 147°36′ E; depth 706–715 m; PAPUA NIUGINI, stn CP3995; MNHN-IM-2013-19848 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 57.4 mm, AL (with canal) 23.7 mm, AL (without canal) 16.4 mm, SW 17.4 mm.</p><p>SHELL (holotype). Shell large, fusiform, with high spire, greyish in color, thin but solid. Protoconch and uppermost teleoconch whorls missing, remaining teleoconch whorls 11.5, upper whorls distinctly roundly angled at shoulder, last and half of penultimate whorls with more rounded shoulder accentuated by low keel. Subsutural ramp concave on upper whorls and nearly flat on last and penultimate whorls. Deep, impressed suture. Strong, oblique, broad, rounded axial folds on shoulder of upper teleoconch whorls, fading on penultimate whorl and absent on last whorl. Folds fade on subsutural ramp, strongly weaken towards lower suture. Folds number increasing from 10 on first remaining whorl to 19 on anterpenultimate one. Weak spiral sculpture of low, rounded, wavy, and narrow cords over entire shell. Cords on subsutural ramp weaker than below shoulder, on shell base and canal intervals between cords equal or slightly exceed cords’ width. Numerous thin, prominent on subsutural ramp growth lines. Shell base convex, smooth transition to long and straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal, inner lip slightly concave, nearly straight. Columellar and parietal sides with narrow, distinct callus, slightly lighter than remaining last whorl. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 10I; studied in MNHN-IM-2013-19848). Marginal teeth duplex, ~330 µm in length (2.5% AL without canal). Major limb lanceolate in dorsal view, curved. Accessory limb relatively broad, at tooth base equals total tooth width, ~0.75 of total tooth length, inserted into distinct deep socket on dorsal side of major limb</p><p>DNA diagnosis (based on 3 cox 1 sequences)</p><p>‘A’ in site 22, ‘T’ in site 67, ‘G’ in site 295, ‘G’ in site 568, ‘C’ in site 607.</p><p>Remarks</p><p>The two other studied specimens have a shell outline similar to the holotype, which is the largest specimen. In the smaller specimens (MNHN-IM-2013-52051, SL 36.9 mm; MNHN-IM-2013-19848, SL 46.5 mm), axial folds on the shoulder are present on the last whorl, although they progressively weaken on the last whorl in the latter specimen. This suggests that the fading of the folds occurs as the shell grows. The protoconch is present in the smallest specimen, but strong erosion makes it impossible to count the number of whorls.</p><p>The species bears some resemblance to Leucosyrinx palawanica (Powell, 1969), differing in having a straighter canal, a significantly lower last whorl and a larger size.</p><p>Distribution</p><p>Bismarck Sea, Solomon Sea, Papua New Guinea, 470– 706 m.</p></div>	https://treatment.plazi.org/id/03FCE539FF983D4F905CFA9F31DF9C89	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF993D4B93E5F97537019914.text	03FCE539FF993D4B93E5F97537019914.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx margaritae (E. A. Smith 1904) Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx margaritae (E.A. Smith, 1904) comb. nov.</p><p>Figs 14E–L, 15A–B</p><p>Pleurotoma (Surcula) margaritae E.A. Smith, 1904: 458 .</p><p>Pleurotoma (Surcula) margaritae – Annandale &amp; Stewart 1909: pl. 14 figs 2, 2a.</p><p>Comitas margaritae – Powell 1969: 268 (23–280), pl. 217 figs 1–2. — Tan &amp; Islami 2021: 325–326, fig. 9d.</p><p>Type material</p><p>Holotype ANDAMAN ISLANDS • off Andaman Is.; depth 405 ftm (= 740 m); ZSI, M 3061/1.</p><p>Other material examined (all sequenced)</p><p>PAPUA NEW GUINEA • 1 lv; Woodlark Is.; 9°12′ S, 152°16′ E; depth 556–645 m; BIOPAPUA, stn CP3740; MNHN-IM-2009-17151 .</p><p>PHILIPPINES • 1 lv; off Luzon I.; 14°55′ N, 123°12′ E; depth 944–1004 m; AURORA 2007, stn CC2702; MNHN-IM-2009-13446 .</p><p>SOLOMON SEA • 1 lv; N Long I.; 5°10′ S, 147°3′ E; depth 724 m; PAPUA NIUGINI, stn CP3982; MNHN-IM-2013-19747 • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=147.6&amp;materialsCitation.latitude=-6.0" title="Search Plazi for locations around (long 147.6/lat -6.0)">Vitiaz Strait</a>; 6°00′ S, 147°36′ E; depth 706–715 m; PAPUA NIUGINI, stn CP3995; MNHN-IM-2013-19853 • 1 lv; SE of Tuam Is; 6°04′ S, 148°12′ E; depth 500–575 m; PAPUA NIUGINI, stn CP4009; MNHN-IM-2013-19931 • 1 lv; Induna I.; 4°35′ S, 152°25′ E; depth 575–616 m; MADEEP, stn CP4266; MNHN-IM-2013-45439 .</p><p>Description</p><p>SHELL. Large, reaching 60 mm. fusiform, with high spire, thin but solid, from very light yellowish to tan in color. Paucispiral small protoconch of 1.5 convex evenly rounded smooth whorls. Upper teleoconch whorls distinctly angulated on shoulder, last whorl in larger specimens nearly evenly rounded with shoulder slightly accentuated by obtuse keel. Subsutural ramp distinctly concave on upper whorls, can be nearly flat on last whorl. Strong, oblique, broad, and rounded axial folds on shoulder of teleoconch whorls. Folds fade on subsutural ramp, strongly weaken towards lower suture, not reaching it on penultimate whorl in large specimens. On the last and posterior part of penultimate whorls folds progressively weaken towards aperture. 14 folds were discernible on last whorl in largest studied specimen (SL 53.1 mm – Fig. 14J–L). Medium developed spiral sculpture, practically absent on ramp, but more distinct below shoulder, of variable in width, low, rounded, and wavy cords, with intervals similar or exceeding cords’ width. Shell base strong to weakly convex, smooth transition to long canal. Narrow, elongate-oval aperture, poorly differentiated from canal. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 15A–B; studied in two specimens, MNHN-IM-2009-13446 (Fig. 15A) and MNHN-IM-2013-19931 (Fig. 15B)). Morphologically similar in both specimens. Marginal teeth duplex, ~195– 390 µm (2.8–3.1% AL without canal). Major limb medium narrow lanceolate in dorsal view, curved. Accessory limb constitutes about half of tooth width, inserted into distinct medium deep socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 6 cox 1 sequences, low confidence)</p><p>‘G’ in site 139, ‘G’ in site 313, ‘C’ in site 401, ‘G’ in site 490, ‘C’ in site 523.</p><p>Remarks</p><p>The species is moderately variable in shell outline and sculpture pattern. Although the best ASAP partition recognizes the six sequenced specimens as a single species, the phylogenetic tree has low support of this node (PP = 0.87, but the bootstrap support is 99). Within the clade two subclades with higher support (0.94 and 0.99) are recognized, both containing specimens collected in the Solomon Sea. We may deal with species in status nascendi, but since the material is rather limited, we consider it as a single species.</p><p>We apply the name L. margaritae with some reservation. Our specimens have similar size (53 vs 60 mm in the holotype), were collected at similar depths (556–944 vs 740 m) and have a rather similar shell outline. Nevertheless, the spiral sculpture is more pronounced in the holotype (Fig. 14E–F), in which the spiral cords are distinct also on the subsutural ramp. Due to the limited material it is impossible to decide at the moment whether this difference is of intra- or interspecific significance. The specimen illustrated by Tan &amp; Islami (2021: fig. 9d) is more similar to our specimens than to the holotype in terms of sculpture, but seemingly has eroded shell surface. Leucosyrinx in general is characterized by the presence of numerous alike species, hardly if even distinguishable morphologically. Therefore, application of existing names to the species is subjective, but in this case we prefer to use the existing name rather than describing a new very similar species.</p><p>In shell outline the species resembles L. legalli sp. nov., but L. margaritae differs in its much larger size.</p><p>Distribution</p><p>From Andaman Is., off Java, to the Philippines, Papua New Guinea, and Solomon Sea, 556– 944 m.</p></div>	https://treatment.plazi.org/id/03FCE539FF993D4B93E5F97537019914	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF9D3D499056FCFB317F9984.text	03FCE539FF9D3D499056FCFB317F9984.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx zahariasi Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx zahariasi sp. nov.</p><p>urn:lsid:zoobank.org:act: 7F740E0D-2145-4B33-90F7-0EACE0F6C8E2</p><p>Figs 15C, 16</p><p>Etymology</p><p>The species is named after Paul Zaharias from MNHN, taxonomist and molecular biologist specializing on the studies of Conoidea and a member of the ERC HYPERDIVERSE team, for his contribution to the knowledge of the group.</p><p>Material examined</p><p>Holotype (sequenced) NEW CALEDONIA • off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=167.25&amp;materialsCitation.latitude=-22.8" title="Search Plazi for locations around (long 167.25/lat -22.8)">Ile des Pins</a>; 22°48′ S, 167°15′ E; depth 440–470 m; TERRASSES, stn CP3115; MNHN-IM-2009-6979.</p><p>Other material (all sequenced)</p><p>NEW CALEDONIA • 2 lv; off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=167.25&amp;materialsCitation.latitude=-22.85" title="Search Plazi for locations around (long 167.25/lat -22.85)">Ile des Pins</a>; 22°51′ S, 167°15′ E; depth 500 m; TERRASSES, stn 3118; MNHN-IM-2009-6873, MNHN-IM-2009-6981 • 2 lv; SW of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=167.21666&amp;materialsCitation.latitude=-22.75" title="Search Plazi for locations around (long 167.21666/lat -22.75)">Ile des Pins</a>; 22°45′ S, 167°13′ E; depth 400–405 m; KANACONO, stn DW4660; MNHN-IM-2013-68027, MNHN-IM-2013-68315 • 3 lv; SW of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=167.28334&amp;materialsCitation.latitude=-22.883333" title="Search Plazi for locations around (long 167.28334/lat -22.883333)">Ile des Pins</a>; 22°53′ S, 167°17′ E; depth 530–545 m; KANACONO, stn DW4666; MNHN-IM-2013-68072, MNHN-IM-2013-68623, MNHN-IM-2013-68624 • 3 lv; SW of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=167.25&amp;materialsCitation.latitude=-22.816668" title="Search Plazi for locations around (long 167.25/lat -22.816668)">Ile des Pins</a>; 22°49′ S, 167°15′ E; depth 445 m; KANACONO, stn DW4669; MNHN-IM-2013-69084, MNHN-IM-2013-69085, MNHN-IM-2013-69116 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 31.3 mm, AL (with canal) 15.9 mm, AL (without canal) 11.0 mm, SW 10.4 mm.</p><p>SHELL (holotype). Shell medium-sized, medium broad fusiform, with medium high spire, very light tan in color, thin and fragile. Protoconch is partially broken, intact one in other specimens of 1.75 smooth and glossy strongly convex whorls. Protoconch–teleoconch transition marked by appearance of definitive sculpture. 8.5 teleoconch whorls, upper whorls distinctly roundly angled at shoulder, less angled on last whorl. Subsutural ramp strongly concave on upper whorls and nearly flat on last whorl. Deep, narrowly channeled suture. Strong, opisthocline narrow, closely spaced, and rounded axial folds on shoulder of upper teleoconch whorls, fading on penultimate whorl and absent on last one. Folds fade on subsutural ramp, reach lower suture on upper telecoconch whorls, increase in number from 12 on first teleoconch whorl to 26 on antepenultimate one. On body whorl shoulder is accentuated by obtuse low keel. Medium strong spiral sculpture of low, rounded, wavy, and narrow cords over entire shell. Cords on subsutural ramp feeble, below shoulder distinct, on shell base and canal intervals between cords equal or slightly narrower cords’ width. Numerous thin, prominent on subsutural ramp growth lines, on last whorl some growth lines on subsutural ramp distinctly thickened. Shell base lightly convex, passes smoothly into long and straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal, inner lip slightly concave, nearly straight. Columellar and parietal sides with narrow, distinct callus, slightly lighter than remaining last whorl. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 15C; studied in MNHN-IM-2013-69116). Marginal teeth duplex, ~180 µm in length (4.1% AL without canal). Major limb lanceolate in dorsal view, curved. Accessory limb relatively broad, at tooth base equals total tooth width, ~0.8of total tooth length, inserted into distinct although shallow socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 12 cox 1 sequences)</p><p>‘G’ in site 355, ‘C’ in site 568, ‘C’ in site 589, ‘C’ in site 607.</p><p>Remarks</p><p>The species is relatively stable in shell characters with clear tendency of reduction and complete disappearance of the axial folds on last whorls in larger specimens. The largest available specimen measures SL 38.3 mm.</p><p>It is somewhat similar in shell outline, but phylogenetically not closely related, to Leucosyrinx margaritae, differing in much closer spaced, more narrow and numerous axial folds and a smaller shell.</p><p>Distribution</p><p>Southern New Caledonia off Ile des Pins, 440– 530 m.</p></div>	https://treatment.plazi.org/id/03FCE539FF9D3D499056FCFB317F9984	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF813D5493DAFAFD30AB9CD0.text	03FCE539FF813D5493DAFAFD30AB9CD0.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx thisbe (E. A. Smith 1906)	<div><p>Leucosyrinx thisbe (E.A. Smith, 1906) comb. nov.</p><p>Fig. 17A–E</p><p>Pleurotoma (Surcula) thisbe E.A. Smith, 1906: 162 .</p><p>Pleurotoma (Surcula) thisbe – Annandale &amp; Stewart 1909: pt. 6, pl. 20 figs 1–2.</p><p>Comitas thisbe – Powell 1969: 276 (23–288), pl. 225 figs 1–2.</p><p>non Comitas melvilli (Schepman, 1913) – Tan &amp; Islami 2021: 326, fig. 9e.</p><p>Type material</p><p>Holotype SRI LANKA • SL 44 mm; off E of Ceylon; depth 1086 ftm (= 1986 m); ZSI, M 1233/1.</p><p>Material examined (sequenced)</p><p>SOLOMON ISLANDS • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=159.63333&amp;materialsCitation.latitude=9.066667" title="Search Plazi for locations around (long 159.63333/lat 9.066667)">Savo</a>; 9°4′ N, 159°38′ E; depth 1230–1306 m; SALOMONBOA 3, stn CP2781; MNHN-IM-2009-16821 .</p><p>Description</p><p>SHELL. Large, reaching 75 mm. broadly fusiform, with high spire, from greyish to light brownish, thick and solid. Protoconch unknown. Teleoconch whorls distinctly roundly angular on shoulder, subsutural ramp significantly deepened in relation to shoulder, concave or with nearly flat side. Medium pronounced to strong subsutural cord. Channeled suture. 18–19 strong, oblique, sinuous axial folds on and below shoulder on last and penultimate whorls, reaching lower suture on upper whorls and extend to shell base on last whorl. Well-developed spiral sculpture of similar in width, rather broad, low, rounded, and wavy cords over entire shell, including subsutural ramp, with intervals narrower than cords’ width. Shell base medium convex, rapidly passing into medium-long straight canal. Rather broad, elongate-oval aperture, well differentiated from canal. Well-developed white columellar and parietal callus. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (studied in MNHN-IM-2009-16821). Typical of genus, duplex marginal teeth ~570 µm in length (2.8% AL without canal).</p><p>DNA diagnosis (based on 1 (!) cox 1 sequence)</p><p>‘A’ in site 88, ‘G’ in site 196, ‘G’ in site 544.</p><p>Remarks</p><p>This very distinct and very large species (SL up to 75.1 mm) is represented in our material by a single specimen. Contrary to most studied species of Leucosyrinx, L. thisbe comb. nov. has a strong thickened subsutural cord (more prominent in our specimen than in the holotype), and correspondingly, the suture is broadly channeled, while the subsutural ramp is significantly deepened in relation to the shoulder. Another unusual character is that very distinct sinuous axial folds (19 on the last whorl and similar number according to the photo of the holotype) extend well to the shell base and reach to the lower suture on the teleoconch whorls.</p><p>The species was known before from a single worn holotype with missing apex and strongly eroded upper whorls. We attribute our specimen to the species with some reservation. Our specimen is much larger (75 mm vs 44 in holotype), and the last whorl is more gradually constricting passing in the canal in comparison with the holotype. Both our specimen and the holotype were collected at large depths 1230–1306 and 1986 m, respectively. Tan &amp; Islami (2021: fig. 9e) illustrated an additional specimen as Comitas melvilli . Their specimen is very similar to the holotype, although having a better pronounced subsutural cord, like in our specimen. Leucosyrinx melvilli (Fig. 17I–J), known only from the holotype, lacks the subsutural cord and has weaker and more numerous axial folds.</p><p>There is some similarity of L. thisbe comb. nov. to L. eurina in spiral and axial scultpture, as well as in the presence of a subsutural cord. Nevertheless, L. thisbe differs in having a higher last whorl, more gradually constricting while passing into canal.</p><p>Distribution</p><p>From Sri Lanka to Solomon Is., 1230–1986 m.</p></div>	https://treatment.plazi.org/id/03FCE539FF813D5493DAFAFD30AB9CD0	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF843D5293E1FE5331289D30.text	03FCE539FF843D5293E1FE5331289D30.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx jeedara Kantor, Hallan & Criscione 2022	<div><p>Leucosyrinx jeedara Kantor, Hallan &amp; Criscione, 2022</p><p>Figs 15D, 18A–E</p><p>Leucosyrinx jeedara Kantor, Hallan &amp; Criscione, 2022: 242, figs 9a–i, 11a–b.</p><p>Type material</p><p>Holotype AUSTRALIA • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=131.84&amp;materialsCitation.latitude=-34.74" title="Search Plazi for locations around (long 131.84/lat -34.74)">Great Australian Bight</a>; 34°44.4′ S, 131°50.4′ E; depth 1350– 1321 m; AMS, C.483810.</p><p>Material examined</p><p>Total of 12 specimens, 6 sequenced (detailed data see Kantor et al. 2022: 242).</p><p>Description</p><p>SHELL. Medium-sized, reaching 33 mm, broadly fusiform, with high spire, from chalky white to to light tan. Protoconch unknown. Teleoconch whorls distinctly roundly angular on shoulder, subsutural ramp, concave on all whorls. Weak subsutural cord. Channeled suture. Strong, oblique, slightly sinuous axial folds on and below shoulder on last and penultimate whorls, reaching lower suture on upper whorls and extend to shell base on last whorl. 19–24 on last whorl, 14–21 on penultimate whorl. Weak to moderately developed spiral sculpture of similar in width, low, rounded cords over entire shell, including subsutural ramp in some specimens, with intervals narrower than cords’ width. Shell base medium convex, rapidly passing into medium-long canal. Medium broad, elongate-oval aperture, well differentiated from canal. Well-developed columellar and parietal callus of same color as remaining last whorl. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 15D; studied in holotype and two paratypes: AMS C.532680 and AMS C.532695). Comprising 33 rows of teeth, 4 nascent. Marginal teeth duplex, ~420 µm in length (4.4% AL without canal). Major limb narrow lanceolate in dorsal view, curved. Accessory limb constitutes about half of tooth width, inserted into distinct medium deep socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 3 cox 1 sequences)</p><p>‘T’ in site 56, ‘A’ in site 58, ‘G’ in site 217.</p><p>Remarks</p><p>The species exhibits uniformity in shell shape but is variable in the number of axial ribs and spiral cords. In shell outline and sculpture pattern L. jeedara most resembles L. thisbe comb. nov., differing in a less pronounced subsutural fold and a much smaller shell (33 vs 75 mm). It also resembles L. mellvilli differing in its smaller shell, higher last whorl and a relatively lower spire.</p><p>Distribution</p><p>Great Australian Bight, 962–1509 m (Kantor et al. 2022).</p></div>	https://treatment.plazi.org/id/03FCE539FF843D5293E1FE5331289D30	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF843D509384F89F304F9FB0.text	03FCE539FF843D509384F89F304F9FB0.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx truwalamuka Kantor, Hallan & Criscione 2022	<div><p>Leucosyrinx truwalamuka Kantor, Hallan &amp; Criscione, 2022</p><p>Figs 15E, 18F–J</p><p>Leucosyrinx truwalamuka Kantor, Hallan &amp; Criscione, 2022: 243, fig. 10a–g.</p><p>Type material</p><p>Holotype AUSTRALIA • Tasmania, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=146.21&amp;materialsCitation.latitude=-44.11" title="Search Plazi for locations around (long 146.21/lat -44.11)">Baseline</a> _14; 44°06.6′ S, 146°12.6′ E; depth 965– 941 m; IN2018_V06_094; AMS C.557045.</p><p>Material examined</p><p>Total 6 specimens, 5 sequenced (detailed data see Kantor et al. 2022: 243).</p><p>Description</p><p>SHELL. Medium-sized, reaching 31 mm, narrow fusiform, with very high spire, light tan. Paucispiral protoconch of about 1.75 rounded whorls. Teleoconch whorls convex, with indistinct shoulder, upper whorls somewhat angular on shoulder, subsutural ramp weakly concave, nearly flat. Impressed shallow suture. Strong, oblique, opisthocline axial folds on and below shoulder, 16–17 on last to anterpenultimate whorls, reaching lower suture on upper whorls and extend to shell base on last whorl. Very weak sculpture of similar in width, low, rounded cords seen only on some parts of shell and canal, present on subsutural ramp. Shell base medium convex, rapidly passing into short straight canal. Narrow elongate-oval aperture, poorly differentiated from canal. Well-developed columellar and parietal callus of same color as remaining last whorl. Medium deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 15E; studied in holotype AMS C.557045). Long, comprising 46 rows of teeth, 17 nascent. Marginal teeth duplex, ~230 µm in length (2.6% AL without canal). Major limb medium broad lanceolate in dorsal view, curved. Accessory limb constitutes about half of tooth width, inserted into shallow socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 3 cox 1 sequence)</p><p>‘C’ in site 34, ‘G’ in site 100, ‘C’ in site 259.</p><p>Remarks</p><p>The shells of younger specimens resemble Leucosyrinx jeedara in having a somewhat more angular whorl profile and, in some cases, more developed spiral sculpture.</p><p>Distribution</p><p>Off Tasmania, 965–1218 m.</p></div>	https://treatment.plazi.org/id/03FCE539FF843D509384F89F304F9FB0	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF863D51905EFA1F30A29CD0.text	03FCE539FF863D51905EFA1F30A29CD0.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx herosae Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx herosae sp. nov.</p><p>urn:lsid:zoobank.org:act: 7E56BC97-FC0A-46F8-B5ED-540A212407B4</p><p>Figs 15G, 19A–E</p><p>Leucosyrinx sp. G – Kantor &amp; Puillandre 2021: figs 11e, 13d–e.</p><p>Etymology</p><p>The species is named after Virginie Héros, a long standing member of the MNHN malacological team, in recognition of her outstanding contribution to collecting, curating and managing the molluscan collection of MNHN.</p><p>Material examined</p><p>Holotype (sequenced) BISMARCK SEA • N Bagabag Is; 4°44′ S, 146°11′ E; depth 540–580 m; PAPUA NIUGINI, stn CP3979; MNHN-IM-2013-19689.</p><p>Other material (all sequenced)</p><p>PAPUA NEW GUINEA • 1 lv; submarine mountains off Bougainville; 5°37′ S, 154°01′ E; depth 398– 399 m; BIOPAPUA, stn DW3748; MNHN-IM-2009-17089 • 1 lv; submarine mountains off Bougainville; 5°39′ S, 153°59′ E; depth 620–663 m; BIOPAPUA, stn DW3749; MNHN-IM-2009-17059 • 1 lv; New Ireland; 2°23′ S, 150°39′ E; depth 490–610 m; KAVIENG 2014, stn CP4438; MNHN-IM-2013-58314 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 47.2 mm, AL (with canal) 22.6 mm, AL (without canal) 14.3 mm, SW 15.5 mm.</p><p>SHELL (holotype). Shell medium-sized, thin but strong, glossy, fusiform, with medium high spire, uniformly light tan in color, narrow subsutural darker band. Paucispiral protoconch of about 1.5 rounded light brown whorls, protoconch–teleoconch transition indistinct due to protoconch erosion, marked by color change. 11 distinctly roundly angled at shoulder teleoconch whorls, concave subsutural ramp, nearly flat on last whorl. The suture is distinct shallow, impressed. 18 strong, oblique, broad, and rounded axial folds on body whorl, 14 on penultimate whorl. Folds fade on subsutural ramp, do not reach lower suture except upper whorls, disappear below shoulder on last whorl. Intervals between folds equal or slightly exceed folds width on last and penultimate whorls. Medium-developed spiral sculpture of distinct low, rounded, wavy, and narrow cords over entire shell, including subsutural ramp. Intervals between cords narrower than cords. Numerous and thin growth lines. Shell base rounded, convex, and passes smoothly into long, straight canal. Narrow, elongate-oval aperture, poorly differentiated from canal, inner lip nearly straight. Columellar and parietal sides with narrow, distinct callus, of same color as remaining last whorl. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 15G; studied in MNHN-IM-2009-17089). Comprising about 30 rows of teeth, 15 nascent. Marginal teeth duplex, ~300 µm in length (3.2% AL without canal). Major limb broad lanceolate in dorsal view, weakly curved. Accessory limb narrow, less than half of tooth width, ~0.8 of total tooth length, inserted into distinct deep socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 4 cox 1 sequences)</p><p>‘A’ in site 55, ‘G’ in site 349, ‘T’ in site 478.</p><p>Remarks</p><p>The species resembles Leucosyrinx diomedea (Powell, 1969), nevertheless differing in a slenderer shell with a longer canal, better pronounced spiral cords on the subsutural ramp and more rounded and shorter axial folds on the shoulder. There is also superficial resemblance to Sibogasyrinx subula, easily distinguished by the radular type as well as by the presence of the row of subsutural nodules, typical of Sibogasyrinx .</p><p>Distribution</p><p>Bismarck Sea, Papua New Guinea, 398– 620 m.</p></div>	https://treatment.plazi.org/id/03FCE539FF863D51905EFA1F30A29CD0	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF893D5C9064FD5A36719EE5.text	03FCE539FF893D5C9064FD5A36719EE5.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx bourgeoisae Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx bourgeoisae sp. nov.</p><p>urn:lsid:zoobank.org:act: A0CCDF20-A2A0-4331-B845-A5A531C4B385</p><p>Figs 15H, 19G–L</p><p>Etymology</p><p>The species is named after Mauricette Bourgeois, a volunteer of many years in the malacology division of MNHN.</p><p>Material examined</p><p>Holotype (sequenced) BISMARCK SEA • N Long I.; 5°9′ S, 147°2′ E; depth 805–865 m; PAPUA NIUGINI, stn DW3985; MNHN-IM-2013-19785.</p><p>Other material (all sequenced)</p><p>NEW CALEDONIA • 1 lv; SE <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=162.53334&amp;materialsCitation.latitude=-21.533333" title="Search Plazi for locations around (long 162.53334/lat -21.533333)">Fairway</a>; 21°32′ S, 162°32′ E; depth 775–792 m; EBISCO; stn CP2649; MNHN-IM-2009-13417 .</p><p>PAPUA NEW GUINEA • 1 lv; New Britain, north of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=151.83333&amp;materialsCitation.latitude=-4.05" title="Search Plazi for locations around (long 151.83333/lat -4.05)">Rabaul</a>; 4°3′ S, 151°50′ E; depth 788–805 m; BIOPAPUA, stn CP3674; MNHN-IM-2009-17002 .</p><p>SOLOMON ISLANDS • 1 lv; 7°31′ S, 156°18′ E; depth 782–884 m; SALOMON 2, stn CP2249; MNHN-IM-2009-13590 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 32.1 mm, AL (with canal) 15.0 mm, AL (without canal) 9.9 mm, SW 11.3 mm.</p><p>SHELL (holotype). Shell medium-sized, thin, fragile, broad fusiform, with medium high spire, very light-yellowish in color, nearly white. Paucispiral, small, bulbous protoconch of about 1.75 rounded light brown and microshagreened whorls, protoconch–teleoconch transition marked by distinct growth line and appearance of shoulder keel. 9.75 distinctly roundly angled at shoulder teleoconch whorls, with weekly concave subsutural ramp, nearly flat on last and penultimate whorls. Distinct, shallow, impressed suture. 15 medium strong, oblique, short axial folds, forming rounded closely spaced knobs on shoulder of last whorl and 16 on penultimate whorl. Folds fade on subsutural ramp, reach the lower suture on upper 4–5 whorls. On last whorl folds disappear shortly below shoulder. On last and penultimate whorls, intervals between folds slightly exceed folds’ width. Distinct spiral sculpture below shoulder of slightly varying in width, low, slightly wavy cords over entire shell below shoulder, including canal. Intervals between cords 1–2 cords’ width. On subsuturtal ramp sculpture indistinct, of very weak spiral striation. Numerous thin but distinct growth lines. Shell base rounded, strongly convex, rapidly constricting and passing into long rather narrow, and straight canal. Medium broad, elongate-oval aperture poorly differentiated from canal, inner lip weakly convex. Columellar and parietal sides with narrow, distinct white callus. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip (judging from growth lines, since outer lip partially broken).</p><p>RADULA (Fig. 15H; studied in holotype). Medium long, comprising about 35 rows of teeth, 11–12 nascent. Marginal teeth duplex, ~350 µm in length (3.5% AL without canal). Major limb narrow lanceolate in dorsal view, curved. Accessory limb about half of tooth width, ~0.75 of total tooth length, inserted into distinct socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 3 cox 1 sequences)</p><p>‘C’ in site 50, ‘C’ in site 401, ‘G’ in site 403, ‘C’ in site 586.</p><p>Remarks</p><p>The species is moderately variable in shell shape and sculpture. Shell is from narrow to broad fusiform with a rapidly to gradually narrowing towards the canal base. In the single specimen from New Caledonia (Fig. 19L) the axial folds extend well to the shell base and reach the lower suture on the teleoconch whorls.</p><p>The species resembles Leucosyrinx sp. 18 and L. margaritae . From the former it differs in a generally broader shell and less pronounced shoulder knobs. From the latter, although being its sister species in the phyloegentic tree, it differs in having a somewhat shorter siphonal canal, although a clear morphological distinction can not be drawn. The studied specimen from New Caledonia is extremely similar to Leucosyrinx sp. 2 (Fig. 19N).</p><p>Distribution</p><p>From New Caledonia to Papua New Guinea and Bismarck Sea, 775– 805 m.</p></div>	https://treatment.plazi.org/id/03FCE539FF893D5C9064FD5A36719EE5	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF8A3D5D909AFAC930C69B40.text	03FCE539FF8A3D5D909AFAC930C69B40.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx undefined-1	<div><p>Leucosyrinx sp. 1</p><p>Figs 15I, 19M</p><p>Material examined (sequenced)</p><p>NEW CALEDONIA • 1 lv; SE of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=167.73334&amp;materialsCitation.latitude=-23.083334" title="Search Plazi for locations around (long 167.73334/lat -23.083334)">Ile des Pins</a>; 23°05′ S, 167°44′ E; depth 700–740 m; KANACONO, stn DW4748; MNHN-IM-2013-66109 .</p><p>Description</p><p>RADULA (Fig. 15I). Comprising about 25 rows of teeth, 8 nascent. Marginal teeth duplex, ~330 µm in length (3.9%AL without canal). Major limb narrow lanceolate in dorsal view, strongly curved.Accessory limb constitutes slightly over half of tooth width, ~0.75 of total tooth length, inserted into distinct deep socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 1 (!) cox 1 sequence)</p><p>‘G’ in site 97, ‘C’ in site 205, ‘C’ in site 271, ‘C’ in site 418.</p><p>Remarks</p><p>This molecularly distinct species is represented in our material by a single specimen (SL 28.2 mm) and, due to the unknown intraspecific variability, we abstain from the formal description of a new species. It shows some resemblance to Leucosyrinx sp. 18, differing in a slightly broader shell with a higher spire. It is very similar to Leucosyrinx sp. 14 from the Coral Sea, differing in its larger size. Both species are not closely related to Leucosyrinx sp. 1 .</p></div>	https://treatment.plazi.org/id/03FCE539FF8A3D5D909AFAC930C69B40	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF8B3D5D909AFEAE318299F1.text	03FCE539FF8B3D5D909AFEAE318299F1.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx undefined-2	<div><p>Leucosyrinx sp. 2</p><p>Figs 19N, 20A</p><p>Material examined (sequenced)</p><p>SOLOMON ISLANDS • 1 lv; Santa Isabel I.; 8°49′ N, 159°43′ E; depth 765–773 m; SALOMON 2, stn CP2179; MNHN-IM-2009-16783 .</p><p>Description</p><p>RADULA (Fig. 20A). Comprising about 35 rows of teeth, 12 nascent. Marginal teeth duplex, ~200 µm in length (2.7% AL without canal). Morphology of teeth very similar to that of Leucosyrinx sp. 1 .</p><p>DNA diagnosis (based on 1 (!) c ox1 sequence)</p><p>‘C’ in site 163, ‘G’ in site 517, ‘T’ in site 622.</p><p>Remarks</p><p>This species is represented in our material by a single specimen. It is conchologically very similar to Leucosyrinx sp. 1 . Since both species are represented by singletons and intraspecific variability is not known, we can not draw morphological differences between them.</p></div>	https://treatment.plazi.org/id/03FCE539FF8B3D5D909AFEAE318299F1	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF8B3D5B9065FBDC30919E7C.text	03FCE539FF8B3D5B9065FBDC30919E7C.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx exulans (Dall 1890)	<div><p>Leucosyrinx exulans (Dall, 1890)</p><p>Fig. 21A–F</p><p>Pleurotoma exulans Dall, 1890: 302, pl. 5 fig. 7.</p><p>“ Leucosyrinx ” exulans – McLean 1971a: fig. 37 (radula of the holotype).</p><p>Type material</p><p>Holotype GALAPAGOS IS. • SL 37 mm; off Isla de San Cristobal; 00°36′30″ S, 89°19′00″ W; depth 634 ftm (= 1160 m); Albatross, stn 2808; USNM 96499.</p><p>Material examined (sequenced)</p><p>NEW CALEDONIA • 1 lv; 23°33′ S, 169°44′ E, depth 3014–3069 m; KANADEEP 2, stn CP5066; MNHN-IM-2019-2111 .</p><p>Description</p><p>SHELL. Medium-sized, reaching 37 mm (holotype), fusiform, thin with medium high spire, yellowishbrown, with lighter canal. Protoconch and upper teleoconch whorls eroded in available material. Teleoconch whorls roundly angulated on shoulder, last whorl in larger specimens can be nearly evenly rounded with shoulder slightly accentuated by obtuse keel. Lightly concave on upper whorls subsutural ramp, can be nearly flat on last whorl. 18–19 on penultimate and last (when present) whorl rather strong, oblique, medium broad, and rounded axial folds on shoulder of teleoconch whorls. Folds fade on subsutural ramp, not reaching lower suture, progressively weaken on last whorl towards aperture in larger specimens. Distinct spiral sculpture similar in width, low, rounded, and wavy cords. Intervals between cords do not exceed the cords’ width. Shell base strongly convex, rapidly constricting and passing into long rather narrow canal. Medium narrow, elongate-oval aperture. Shallow subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>DNA diagnosis (based on 1 (!) cox 1 sequence)</p><p>‘G’ in site 25, ‘T’ in site 139, ‘G’ in site 439, ‘T’ in site 604.</p><p>Remarks</p><p>The species was previously known only from two lots in USNM, collected off Galapagos Is. at depths of 1160–1480 m. McLean (1971a) illustrated the radula of the holotype using light microscopy, revealing features similar to those of other species of Leucosyrinx .</p><p>A single specimen in our material was collected off southern New Caledonia at depths of 3014–3069 m. Although conchologically similar to the holotype, this specimen is significantly smaller (18 mm compared to 37 mm). Despite being collected far from the type locality, we tentatively attribute this specimen to L. exulans .</p><p>The conspecifity of our specimen with the holotype of L. exulans can only be confirmed by sequencing topotypic specimens. However, this is unlikely, as the species has not been recollected since its original description. In its current understanding, L. exulans is considered the most broadly distributed Pacific representative of the genus.</p><p>The species shows some resemblance to L. anteridion (Watson, 1881) but differs in its darker coloration and higher spire. Another similar species is L. melvilli, distant in the phylogenetic tree, although L. melvilli is characterized by a higher spire, more numerous axial ribs, and a more abrupt narrowing of the shell base toward the canal.</p><p>Distribution</p><p>Galapagos Is., New Caledonia, 1160–3014 m.</p></div>	https://treatment.plazi.org/id/03FCE539FF8B3D5B9065FBDC30919E7C	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FF8F3D269069FECA338298BE.text	03FCE539FF8F3D269069FECA338298BE.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx bernardeti Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx bernardeti sp. nov.</p><p>urn:lsid:zoobank.org:act: 976FD6A3-CB43-408C-90B8-472BF11D516D</p><p>Figs 20C–D, 21I–M</p><p>Leucosyrinx sp. F – Kantor &amp; Puillandre 2021: figs 11d, 13k.</p><p>Etymology</p><p>The species is named after Jean-François Bernardet, member of the volunteer team of MNHN, working both on the mollusc and crustacean collections.</p><p>Material examined</p><p>Holotype (sequenced) NEW CALEDONIA • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=161.0&amp;materialsCitation.latitude=20.85" title="Search Plazi for locations around (long 161.0/lat 20.85)">Coral Sea</a>, S <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=161.0&amp;materialsCitation.latitude=20.85" title="Search Plazi for locations around (long 161.0/lat 20.85)">Lansdowne Bank</a>; 20°51′ N, 161°00′ E; depth not registered; KANADEEP, stn CP5049; MNHN-IM-2013-48121.</p><p>Other material (sequenced)</p><p>NEW CALEDONIA • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=158.75&amp;materialsCitation.latitude=19.65" title="Search Plazi for locations around (long 158.75/lat 19.65)">Coral Sea</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=158.75&amp;materialsCitation.latitude=19.65" title="Search Plazi for locations around (long 158.75/lat 19.65)">Chesterfield Plateau</a>; 19°39′ N, 158°45′ E; depth 603–630 m; EBISCO, stn CP2600; MNHN-IM-2007-17846 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 34.4 mm, AL (with canal) 17.6 mm, AL (without canal) 10.4 mm, SW 10.3 mm.</p><p>SHELL (holotype). Shell medium-sized, thin but rather strong, slender, narrowly fusiform, with a high spire, off-white. Paucispiral small protoconch of about 1.75 smooth, bulbous, yellow whorls, protoconch–teleoconch transition marked by appearance of definitive sculpture. Teleoconch whorls weakly obtusely angular on shoulder, subsutural ramp evenly moderately concave on all whorls. Distinct impressed suture. 26–27 moderately developed, slightly oblique, dense axial folds on and shortly below shoulder on last and penultimate whorls, folds do not reach lower suture on teleoconch whorls, gradually diminish on last whorl towards aperture, although still present. Well-developed spiral sculpture of similar width, narrow, low, rounded, and wavy cords over entire shell, including subsutural ramp. 5 slightly broader cords below suture and 4 significantly narrower ones on lower part of ramp and shoulder. Below shoulder on last whorl about 55 cords. Intervals between cords are in most cases narrower than the cords’ width, although can exceed the cord’s width on shell base and canal. Shell base weakly convex, gradually narrows on passing into long and broad weakly curving canal. Narrow oval, poorly differentiated from canal aperture. Well-developed columellar and parietal callus of same color as remaining shell. Medium deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULAE (Fig. 20C–D; studied in holotype and MNHN-IM-2007-17846, very similar). Marginal teeth duplex, ~320–465 µm in length (4.6–4.9% AL without canal). Major limb medium broad lanceolate in dorsal view, weakly curved. Accessory limb fible, less than half of tooth width, flattened, ~0.75 of total tooth length, inserted into distinct deep socket on dorsal side of major limb extending its entire length.</p><p>DNA diagnosis (based on 2 cox 1 sequences)</p><p>‘G’ in site 268, ‘G’ in site 337, ‘G’ in site 472, ‘G’ in site 535, ‘G’ in site 604.</p><p>Remarks</p><p>This highly distinct species is well differentiated from its congeners by its narrow fusiform shell shape and relatively weak development of the spiral sculpture elements. It closely resembles Sibogasyrinx pikei (Dell, 1963) from New Zealand in overall shell shape but differs notably in the absence of axial subsutural nodules, which are present in S. pikei (see below). The new species also bears a strong resemblance to Leucosyrinx sp. 3, differing in having more numerous and closely spaced spiral cords. In Leucosyrinx sp. 3, there are about 40 cords on the last whorl below the shoulder, whereas in L. bernardeti sp. nov. of the same size, there are about 55 cords. Additionally, the axial folds are absent on the last whorl in Leucosyrinx sp. 3, where they are replaced by an indistinct spiral keel.</p><p>Distribution</p><p>Coral Sea, 603– 630 m.</p></div>	https://treatment.plazi.org/id/03FCE539FF8F3D269069FECA338298BE	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFF03D26909AFD1C30AD9ED3.text	03FCE539FFF03D26909AFD1C30AD9ED3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx undefined-3	<div><p>Leucosyrinx sp. 3</p><p>Fig. 21N–O</p><p>Material examined (sequenced)</p><p>PHILIPPINES • 1 lv; off Bohol I., 8°49′ N, 123°38′ E; depth 357–372 m; PANGLAO 2005, stn CP2360; MNHN-IM-2007-42445 .</p><p>DNA diagnosis (based on 1 (!) cox 1 sequence)</p><p>‘C’ in site 145, ‘G’ in site 166, ‘C’ in site 301, ‘C’ in site 463, ‘C’ in site 548.</p><p>Remarks</p><p>The medium-sized species (SL 34.1 mm) is represented in our material by a single specimen; therefore, we abstain from its formal description as a new species. It has strong resemblance to L. bernardeti sp. nov. (see the latter species for comparison).</p></div>	https://treatment.plazi.org/id/03FCE539FFF03D26909AFD1C30AD9ED3	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFF03D2593DAFB3E33AD998E.text	03FCE539FFF03D2593DAFB3E33AD998E.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx bolognai (Bozzetti 2001)	<div><p>Leucosyrinx bolognai (Bozzetti, 2001) comb. nov.</p><p>Figs 20E, 22A–E</p><p>Comitas bolognai Bozzetti, 2001: 18, unnumbered figure.</p><p>Type material</p><p>Holotype MADAGASCAR • Tuléar; MNHN-IM-2000-2819 .</p><p>Material examined (sequenced)</p><p>MADAGASCAR • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=47.0&amp;materialsCitation.latitude=-14.8" title="Search Plazi for locations around (long 47.0/lat -14.8)">Baie Mahajamba</a>; 14°48′ S, 47°00′ E; depth 620–637 m; MIRIKY, stn CP3249; MNHN-IM-2009-16895 • 2 lv; off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=46.0&amp;materialsCitation.latitude=-15.366667" title="Search Plazi for locations around (long 46.0/lat -15.366667)">Majunga</a>; 15°22′ S, 46°00′ E; depth 493–662 m; MIRIKY, stn CP3250; MNHN-IM-2009-16896, MNHN-IM-2009-16899 .</p><p>Non-sequenced material</p><p>MADAGASCAR • 1 dd; 22°18′ S, 43°02′ E; depth 640–660 m; VAUBAN, stn CH112; MNHN-IM-2016-4822 .</p><p>MOZAMBIQUE CHANNEL • 1 dd; 19°35′ S, 36°46′ E; depth 518–524 m; MAINBAZA, stn CC3153; MNHN-IM-2016-4628 .</p><p>NE MADAGASCAR • 6 dd; 15°22′ S, 46°00′ E; depth 493–750 m; MIRIKY, stn CP3250 • 4 dd; 14°47′ S, 46°58′ E; depth 512–680 m; • 1 dd; 14°47′ S, 46°58′ E; depth 512–680 m; MIRIKY, stn CP3285; MNHN-IM-2016-4615 .</p><p>SW MADAGASCAR • 3 dd; 22°25′ S, 43°05′ E; depth 530 m; Campagne crevettière 1986, stn 56; MNHN-IM-2016-4622, MNHN-IM-2016-4644 • 4 dd; 22°26′ S, 43°06′ E; depth 460 m; Campagne crevettière 1986, stn 57; MNHN-IM-2016-4640, MNHN-IM-2016-4636 • 1 dd; 22°26′ S, 43°06′ E; depth 475 m; Campagne crevettière 1986, stn 60; MNHN-IM-2016-4627 • 1 dd; 22°14′ S, 43°05′ E; depth 530 m; Campagne crevettière 1986, stn 62; MNHN-IM-2016-4635 • 1 dd; 22°27′ S, 43°05′ E; depth 530 m; Campagne crevettière 1986, stn 63; MNHN-IM-2016-4629 • 1 dd; 22°26′ S, 43°03′ E; depth 520 m; Campagne crevettière 1986, stn 65; MNHN-IM-2016-4634 • 1 dd; 22°11′ S, 43°03′ E; depth 540 m; Campagne crevettière 1986, stn 72; MNHN-IM-2016-4637 • 3 dd; 22°26′ S, 43°03′ E; depth 530 m; Campagne crevettière 1986, stn 74; MNHN-IM-2016-4639 • 1 dd; 22°13′ S, 43°03′ E; depth 560 m; Campagne crevettière 1986, stn 75; MNHN-IM-2016-4617 • 4 dd; 22°22′ S, 43°03′ E; depth 530 m; Campagne crevettière 1986, stn 76; MNHN-IM-2016-4635 • 1 dd; 22°10′ S, 43°03′ E; depth 525 m; stn79; MNHN-M-2016-4633 • 2 dd; 22°23′ S, 43°03′ E; depth 525 m; Campagne crevettière 1986, stn 81; MNHN-IM-2016-4641 • 1 dd; 22°11′ S, 43°03′ E; depth 520 m; Campagne crevettière 1986, stn 82; MNHN-IM-2016-4625 • 1 dd; 22°21′ S, 43°04′ E; depth 535 m; Campagne crevettière 1986, stn 84; MNHN-IM-2016-4621 • 1 dd; 22°18′ S, 43°02′ E; depth 590 m; Campagne crevettière 1986, stn 126; MNHN-IM-2016-4619 • 1 dd; 22°27′ S, 43°07′ E; depth 350 m; Chalutier “Mascareignes III”, stn 3; MNHN-IM-2016-4642 • 1 dd; 22°17′ S, 43°04′ E; depth 425–450 m; Chalutier “Mascareignes III”, stn 8; MNHN-IM-2016-4632 • 1 dd; 22°24′ S, 43°05′ E; depth 400–425 m; Chalutier “Mascareignes III”, stn 12; MNHN-IM-2016-4620 • 1 dd; 22°18′ S, 43°05′ E; depth 425 m; Chalutier “Mascareignes III”, stn 13; MNHN-IM-2016-4618 • 1 dd; 22°18′ S, 43°05′ E; depth 450– 475 m; Chalutier “Mascareignes III”, stn 37; MNHN-IM-2016-4631 • 1 dd; 22°24′ S, 43°06′ E; depth 400–500 m; Chalutier “Mascareignes III”, stn 38; MNHN-IM-2016-4630 • 1 dd; 22°25′ S, 43°05′ E; depth 530 m; Chalutier “Mascareignes III”, stn CH70; MNHN-IM-2016-4626 .</p><p>Description</p><p>SHELL. Very large, reaching 90 mm (82.9 mm in holotype), broadly fusiform, strong, with medium high spire, light orange or beige. Small, bulbous, paucispiral protoconch of about 1.75 conex microshagreened whorls, same color as teleoconch. Protoconch–teleoconch transition clearly markied by thickened growth line and appearance of shoulder keel. Teleoconch whorls obtusely angular on shoulder in smaller specimens and on upper teleoconch whorls of holotype. Subsutural ramp distinctly concave on all whorls. Distinct impressed suture. 14–16 on last whorl strong, slightly oblique axial folds present on and below shoulder. Folds can reach lower suture on teleoconch whorls and can extend to shell base. Intervals between folds similar or exceding folds’ width. Moderately well-developed spiral sculpture of varying width and irregularly spaced very low, rounded cords, over entire shell except subsutural ramp. On ramp cords either lacking or very weak and hardly discernible. Intervals between cords from narrower than cords’ width to twice as broad. Shell base moderately convex, gradually narrowing at passing into medium-long broad and straight canal, slightly inclined leftwards. Rather broad, elongate-oval to irregularly shaped aperture, poorly differentiated from canal. Well-developed white or light yellowish columellar and parietal callus. Columellar and parietal callus is well-developed. Shallow subsutural, arcuate, anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 20E; examined in MNHN-IM-2009-16895). Marginal teeth duplex, ~300 µm in length (2.4% AL without canal). Major limb medium broad lanceolate in dorsal view, weakly curved. Accessory limb about half of tooth width, ~0.75 of total tooth length, inserted into distinct deep socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 3 cox 1 sequences)</p><p>‘C’ in site 289, ‘C’ in site 487, ‘G’ in site 556.</p><p>Remarks</p><p>This is the largest known species of Leucosyrinx, reaching up to 90 mm in length. Our largest sequenced specimen, with a shell length 69.4 mm, is comparable in size with the holotype. Our specimens closely resemble the holotype, particularly the largest one (MNHN-IM-2009-16896). The smaller sequenced specimens also show a strong similarity to the holotype when comparing corresponding whorls.</p><p>The type locality is given in broad terms, without specifying a depth range. Here, we confirm the occurrence of this species off northwestern Madagascar at depths of 493–620 meters.</p><p>The reclassification of this species from the genus Comitas to Leucosyrinx, supported by both molecular, conchological (shape and position of the anal sinus), and anatomical (radula) data, underscores the challenges in conchological differentiation between Comitas and Leucosyrinx .</p><p>Distribution</p><p>Madagascar, 350– 640 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFF03D2593DAFB3E33AD998E	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFF33D229033FC6D33AD9F2F.text	03FCE539FFF33D229033FC6D33AD9F2F.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx madagascarensis Ardovini 2022	<div><p>Leucosyrinx madagascarensis Ardovini, 2022</p><p>Fig. 22F–L</p><p>Comitas eurina (E.A. Smith, 1899) – Robin 2008: 449, fig. 10 (not Smith, 1899).</p><p>Leucosyrinx madagascarensis Ardovini, 2022: 7, text figs.</p><p>Leucosyrinx sp. E – Kantor &amp; Puillandre 2021: pl. 13g.</p><p>Type material</p><p>Holotype MADAGASCAR • west coast of Madagascar; depth 600–700 m; MMM.</p><p>Material examined (all sequenced)</p><p>MADAGASCAR • 2 lv; off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=46.0&amp;materialsCitation.latitude=-15.366667" title="Search Plazi for locations around (long 46.0/lat -15.366667)">Majunga</a>; 15°22′ S, 46°00′ E; depth 493–662 m; MIRIKY, stn CP3250; MNHN-IM-2009-16897, MNHN-IM-2009-16898 .</p><p>Non-sequenced material</p><p>NW MADAGASCAR • 16 dd; 15°27′ S, 46°0′ E; depth 403–750 m; MIRIKY, stn CP3250 • 2 dd; 14°27′ S, 47°25′ E; depth 347–408 m; MIRIKY, stn CP3291</p><p>SW MADAGASCAR • 1 dd; 22°10′ S, 43°05′ E; depth 525 m; Campagne crevettière 1986, stn 79; MNHN-IM-2016-4823 • 1 dd; 22°23′ S, 43°03′ E; depth 525 m; Campagne crevettière 1986, stn 81; MNHN-IM-2016-4824 .</p><p>Description</p><p>SHELL. Large, reaching 50.6 mm, strong, from narrow to medium broad fusiform, with high spire, light orange. Protoconch small, bulbous, paucispiral. Teleoconch whorls distinctly obtusely angular on shoulder, subsutural ramp distinctly concave on all whorls, from narrow to medium broad. Distinct impressed suture. 19–21 strong, slightly oblique to nearly ortocline axial folds on and below shoulder on last whorl, 16–20 on penultimate whorl, reach lower suture on teleoconch whorls and disappear shortly below shoulder on last whorl. Intervals between folds narrower than folds’ width. Very distinct spiral sculpture of similar width, closely spaced, rounded cords, over entire shell. On subsutural ramp cords weaker than on shoulder and below. Intervals between cords usually half of cords’ width, rarely equal to the cords’ width. About 30 cords on the last whorl on and below shoulder. Shell base strongly convex, quickly narrows at passing to medium-long rather narrow, slightly inclined leftwards canal. Rather broad, elongate-oval aperture, well differentiated from canal. Well-developed, white or light yellowish columellar and parietal callus. Medium deep, subsutural, arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (studied in MNHN-IM-2009-16897). Comprising about 25 rows of teeth, 11 nascent. Marginal teeth duplex, ~360 µm in length (2.2% of AL without canal). Major limb medium broad lanceolate, strongly curved. Accessory limb twice as narrow, ~0.7 of total tooth length, inserted into deep distinct socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 2 cox 1 sequences)</p><p>‘G’ in site 79, ‘C’ in site 347, ‘G’ in site 355, ‘C’ in site 418.</p><p>Remarks</p><p>Our sequenced specimens are very similar to the holotype and paratypes, illustrated by Ardovini (2022) and were mentioned as conspecific in the original description. Ardovini (2022) did not provide the exact collection site of his specimens, originating from the fishery boats stationed in the Tulear harbor but operating in the sea area north until the city of Morondava. Our specimens originated from off Majunga, much farther north from Morondava.</p><p>The species is most similar to Leucosyrinx eurina (E.A. Smith, 1899), but differs in having a slenderer light-orange shell compared to the white-greyish shell shell of L. eurina (E.A. Smith 1899; Tan &amp; Islami 2021).</p><p>Distribution</p><p>Madagascar, 347– 600 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFF33D229033FC6D33AD9F2F	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFF43D219008FA9330AB9B54.text	03FCE539FFF43D219008FA9330AB9B54.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx luzonica (Powell 1969)	<div><p>Leucosyrinx luzonica (Powell, 1969)</p><p>Figs 20F, 23A–H</p><p>Comitas luzonica Powell, 1969: 269 (23-281), pl. 225 fig. 7.</p><p>Type material</p><p>Holotype PHILIPPINES • off Hermana Mayor I., <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=119.67222&amp;materialsCitation.latitude=15.970833" title="Search Plazi for locations around (long 119.67222/lat 15.970833)">western Luzon</a>; 15°58′15″ N, 119°40′20″ E; depth 1719 m; Albatross, stn 5439; USNM 238476.</p><p>Material examined (sequenced)</p><p>PHILIPPINES • 1 lv; Luzon I.; 15°06′ N, 123°03′ E; depth 1743–1754 m; AURORA 2007, stn CP2683; MNHN-IM-2009-13440 • 1 lv; Luzon I.; 15°06′ N, 123°03′ E; depth 1762–1806 m; AURORA 2007, stn CP2689; MNHN-IM-2009-13444 • 2 lv; Luzon I.; 15°36′ N, 121°56′ E; depth 1456–1471 m; AURORA 2007, stn CP2751; MNHN-IM-2009-13469, MNHN-IM-2009-13472 .</p><p>SOUTH CHINA SEA • 1 lv; S off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=118.25&amp;materialsCitation.latitude=21.583334" title="Search Plazi for locations around (long 118.25/lat 21.583334)">Taiwan Bank</a>; 21°35′ N, 118°15′ E; depth 1634–1683 m; ZhongSha 2015, stn CP4163; MNHN-IM-2013-59559 .</p><p>Description</p><p>SHELL. Medium-sized, reaching 42 mm (holotype), thin and fragile, broadly fusiform, with medium high spire, brownish-olive. Protoconch unknown. Teleoconch whorls obtusely angular on shoulder, with distinctly concave subsutural ramp. Narrowly channeled suture. 16–18 strong, slightly oblique, axial folds on and shortly below shoulder on last whorl, folds do not reach lower suture on teleoconch whorls. Well-developed spiral sculpture of similar width, rather broad, low, rounded cords over entire shell, less pronounced on subsutural ramp. Intervals between cords narrower than cords’ width. Shell base strongly convex, rapidly narrowing, smooth transition to medium-long straight canal, slightly inclined leftwards. Rather broad, elongate-oval aperture, well differentiated from canal. Columellar and parietal callus well-developed, white. deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip (judging from growth lines, since outer apertural lip is incomplete in all our specimens).</p><p>RADULA (Fig. 20F; studied MNHN-IM-2009-13444). Comprising about 30 rows of teeth, 11–12 nascent. Marginal teeth duplex, long, ~460 µm in length (6.6% of AL without canal). Major limb narrow lanceolate, slightly curved. Accessory limb more than twice as narrow, rather flat, ~0.75 of total tooth length, inserted into deep distinct socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 5 cox 1 sequences)</p><p>‘T’ in site 34, ‘T’ in site 67, ‘C’ in site 85, ‘G’ in site 280.</p><p>Remarks</p><p>The species was originally described based on a single specimen and has not been mentioned in the literature since its original description. The reference to L. luzonica by Kantor et al. (2018) is attributed here to L. quinetae sp. nov. (see below), leaving the intraspecific variability of L. luzonica unstudied. In our material, we identified three molecularly distinct species strongly resembling the holotype of L. luzonica in shell characteristics, here referred to as L. luzonica, L. quinetae, and Leucosyrinx sp. 19. Applying the existing name to any of these species remains somewhat subjective. The two former species were collected close to the type locality (western Luzon, Philippines) – eastern Luzon and South China Sea ( L. luzonica) and South China Sea ( L. quinetae).</p><p>One minor character shared by both specimens we attributed to L. luzonica and the holotype of this species is the pattern of the spiral sculpture. In L. luzonica, the spiral cords are closely spaced, with intervals narrower than the width of the cords, whereas in L. quinetae sp. nov., the intervals are equal to or wider than the cords’ width. Additionally, L. quinetae is significantly larger, reaching 60 mm in shell length.</p><p>The third similar species, Leucosyrinx sp. 19, is represented by a single specimen and exhibits a spiral sculpture pattern similar to that of L. luzonica . However, it is smaller (SL 26.8 mm) and was collected farther from the type locality of L. luzonica – off Solomon Is. – than specimens attributed here to L. luzonica . Therefore, we attribute the Powell’s name to the species collected in the Philippines and South China Sea.</p><p>Leucosyrinx luzonica also shows clear similarities to the holotype of Comitas thisbe diomedea Powell, 1969, which was described from Celebes, Indonesia, at depths of 987–1022 m. In contrast, our specimens were collected from greater depths: 1456–1762 m in the Philippines and South China Sea. Given these similarities, it is possible that L. luzonica and C. diomedea are conspecific. Nevertheless, we presently consider L. diomedea as a separate species pending study of additional material from Indonesia.</p><p>Distribution</p><p>Philippines to South China Sea, 1456–1743 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFF43D219008FA9330AB9B54	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFF73D2F9053FBA630709C67.text	03FCE539FFF73D2F9053FBA630709C67.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx quinetae Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx quinetae sp. nov.</p><p>urn:lsid:zoobank.org:act: 155AB07E-50EC-4DD0-A646-6CF0A642B2D1</p><p>Figs 20G, 24A–G</p><p>Leucosyrinx luzonica – Kantor et al. 2018: 75, 77, figs 20d, 21b–f (non Powell, 1969).</p><p>Etymology</p><p>The species is named after Béatrice Quinet, a volunteer of many years in the molluscan team of MNHN.</p><p>Material examined</p><p>Holotype (sequenced) SOUTH CHINA SEA • S of Taiping I.; 10°26′ N, 114°14′ E; depth 1707–1799 m; NanHai 2014, stn CP4108; MNHN-IM-2013-44303.</p><p>Other material (all sequenced)</p><p>SOUTH CHINA SEA • 3 lv; S of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=118.25&amp;materialsCitation.latitude=21.583334" title="Search Plazi for locations around (long 118.25/lat 21.583334)">Taiwan Bank</a>; 21°35′ N, 118°15′ E; depth 1634–1683 m; ZhongSha 2015, stn CP4163; MNHN-IM-2013-59549 to MNHN-IM-2013-59551 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 54.1 mm, AL (with canal) 27.3 mm, AL (without canal) 18.0 mm, SW 21.1 mm.</p><p>SHELL (holotype). Shell large, broad fusiform, thin but strong, with medium high spire, covered by thin yellowish periostracum, greyish-olive in color, with slightly lighter canal. Protoconch and upper teleoconch whorls missing, remaining slightly over 7 whorls. Teleoconch whorls distinctly angled at shoulder, with concave subsutural ramp on all whorls. Distinct, shallow, impressed suture. 19 strong, oblique, narrow axial folds on last whorl, 14 on penultimate one. Folds fade on subsutural, reach lower suture on all whorls. On last whorl folds extend to periphery and shell base. Intervals between folds nearly twice exceed folds’ width on last and penultimate whorls. Distinct sculpture of similar in size, low, slightly wavy cords over entire shell, including subsutural ramp. On subsuturtal ramp cords less pronounced and broader spaced, than on shoulder and shell base. The broadest intervals between cords equal or exceed cords’s width. Numerous, thin, indistinct growth lines. Shell base rounded, strongly convex, rapidly constricting and passing into long rather narrow, straight canal. Medium broad, elongate-oval aperture, poorly differentiated from canal, inner lip weakly concave. Columellar and parietal sides covered by narrow, distinct white callus. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULAE (Fig. 20G; studied in holotype and MNHN-IM-2013-59549, very similar in both specimens). Rather long, comprising about 35 rows of teeth, 7–8 nascent. Marginal teeth duplex, ~410–620 µm in length (3.1–3.4% AL without canal). Major limb narrow lanceolate in dorsal view, strongly curved. Accessory limb about half of tooth width, ~0.75 of total tooth length, inserted into distinct socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 4 cox 1 sequences)</p><p>‘C’ in site 22, ‘T’ in site 49, ‘C’ in site 421.</p><p>Remarks</p><p>The species can reach a shell length of 60 mm. There is considerable interspecific variability, with the canal ranging from narrow to broad, resulting in noticeably different shell outlines. The axial folds are most pronounced in the holotype, where they can be limited to knobs on a shoulder but may become faint and difficult to discern on the last whorl. In specimens of similar size, the number of folds on the last whorl varies between 16 and 21.</p><p>The holotype closely resembles that of L. luzonica (illustrated in Fig. 24H for comparison, shown at the same scale) and was initially identified as such by Kantor et al. (2018). However, other sequenced specimens exhibit significant differences, such as a wider and visually shorter canal or a slenderer shell (e.g., MNHN-IM-2013-59550, Fig. 24E–F). The spiral sculpture also shows some variation. In some specimens, only the broadest intervals between cords are wider than the cords themselves, while in the specimen MNHN-IM-2013-59549, the intervals are nearly twice as wide as the cords.</p><p>The new species differs from L. luzonica in having a much larger (60 mm vs 42 mm) and thicker shell, as well as in details in its spiral sculpture (see the Remarks section of L. luzonica for further comparison).</p><p>Distribution</p><p>South China Sea, 1634–1707 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFF73D2F9053FBA630709C67	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFF93D2A905DF944310F9BB1.text	03FCE539FFF93D2A905DF944310F9BB1.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx modicae Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx modicae sp. nov.</p><p>urn:lsid:zoobank.org:act: 132350F5-084B-4182-9232-BF5B5C2CDEDF</p><p>Fig. 25A–F</p><p>Leucosyrinx sp. B – Kantor &amp; Puillandre 2021: fig. 13i.</p><p>Etymology</p><p>The species is named after Maria Vittoria Modica, world known specialist in toxinology and systematics of Neogastropoda and our many years companion in expeditions organized by MNHN.</p><p>Material examined</p><p>Holotype (sequenced) SOLOMON ISLANDS • SW Santa Isabel I.; 8°24′ N, 159°23′ E; depth 897–1057 m; SALOMON 2, stn CP2197; MNHN-IM-2009-13570.</p><p>Other material (all sequenced)</p><p>SOLOMON ISLANDS • 1 lv; Santa Isabel I.; 8°47′ N, 159°38′ E; depth 762–1060 m; SALOMON 2, stn CP2182; MNHN-IM-2009-16764 .</p><p>SOUTHERN NEW CALEDONIA • 1 lv; 22°19′ N, 167°22′ E; depth 815–870 m; EXBODI, stn CP3844; MNHN-IM-2013-52093 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 31.8 mm, AL (with canal) 15.4 mm, AL (without canal) 10.0 mm, SW 11.3 mm.</p><p>SHELL (holotype). Shell medium-sized, thin, fragile, biconical, with high spire, very light-yellowish in color, nearly white. About 9 distinctly roundly angled at shoulder teleoconch whorls, with strongly concave on all whorls subsutural ramp. Protoconch missing, uppermost whorls strongly eroded. Distinct impressed suture. 13–14 strong, oblique axial folds on last and penultimate whorls. Folds fade on subsutural ramp, reach lower suture, extend to shell base. Intervals between folds 1.5–2 times exceed folds’ width on last and penultimate whorls. Very distinct spiral sculpture of similar (except subsutural ramp) in width, low, slightly wavy cords over entire shell surface, distinct on shoulder and on axial folds. Intervals between cords narrower than cords’ width, only between few cords intervals equal or even slightly exceed cords’ width. On subsutural ramp cords distinct, significantly vary in width, can be nearly twice as broad then on and below shoulder, 9 cords on subsutural ramp of last whorl, 7 on penultimate. Numerous thin but distinct growth lines. Shell base rounded, medium convex, gradually constricting and passing into medium long straight canal. Narrow elongate-oval aperture, poorly differentiated from canal, inner lip weakly convex. Columellar and parietal sides covered by narrow, distinct white callus. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (examined in MNHN-IM-2013-52093). Typical of genus. Marginal teeth duplex, ~280 µm in length (4.7% AL without canal).</p><p>DNA diagnosis (based on 3 cox 1 sequences)</p><p>‘C’ in site 103, ‘T’ in site 145, ‘C’ in site 640.</p><p>Remarks</p><p>The protoconch is retained in one specimen (MNHN-IM-2013-52093). It is paucispiral, small, and bulbous, consisting of about 1.75 rounded, light brown, microshagreened whorls. The transition between the protoconch and teleoconch is indistinct, marked by the appearance of a shoulder keel. The holotype is the largest specimen.</p><p>The species is moderately variable: while the sculpture pattern is consistent across all available specimens, the slenderness of the shell varies (compare Fig. 25A and 25D).</p><p>The new species is somewhat similar to L. bourgeoisae sp. nov., but differs in having distinct spiral cords on the subsutural ramp and narrower, more closely spaced cords on the last whorl below the shoulder. It also strongly resembles L. maestratii sp. nov., but differs in its larger size (SL up to 31.8 mm vs 24 mm). These species are not closely related in the phylogenetic tree.</p><p>Distribution</p><p>Southern New Caledonia and Solomon Is., 762– 897 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFF93D2A905DF944310F9BB1	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFFC3D2B906BFE1E33BD9896.text	03FCE539FFFC3D2B906BFE1E33BD9896.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx maestratii Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx maestratii sp. nov.</p><p>urn:lsid:zoobank.org:act: 7C037EBD-C401-4D3D-939F-D101B59497DD</p><p>Fig. 25G–J</p><p>Etymology</p><p>The species is named after Philippe Maestrati, a long standing member of the MNHN malacological team, in recognition of his outstanding contribution to collecting, curating and managing the molluscan collection of MNHN.</p><p>Material examined</p><p>Holotype (sequenced) SOLOMON ISLANDS • NW Santa Isabel I.; 7°49′ S, 157°41′ E; depth 1045–1118 m; SALOMON 2, stn CP2217; MNHN-IM-2009-16770.</p><p>Other material (sequenced)</p><p>SOLOMON ISLANDS • 1 lv; 7°38′ S, 156°59′ E; depth 970–1060 m; SALOMON 2, stn CP2270; MNHN-IM-2009-16789 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 22.8 mm, AL (with canal) 11.1 mm, AL (without canal) 7.3 mm, SW 8.1 mm.</p><p>SHELL (holotype). Shell small, thin, fragile, biconical, with high spire, very light-yellowish, nearly white. Paucispiral light orange, small, bulbous, microshagreened, strongly eroded protoconch. Protoconch-teleoconch transition non discernible due to erosion. About 8.5 strongly roundly angled at shoulder teleoconch whorls, strongly concave on all whorls subsutural ramp. Distinct impressed suture. 15–16 strong, oblique axial folds, on last and penultimate whorls. Folds fade on subsutural ramp, reaching lower suture, extend to shell base. Intervals between folds equal or narrower than folds’ width on last and penultimate whorls. Very distinct spiral sculpture of similar in width, low, slightly wavy cords over entire shell, distinct on shoulder, covering also axial folds. Intervals between cords are narrower than cords’ width and only between few cords intervals equal to cords’ width. Cords distinct on subsutural ramp, slightly vary in width, 8 cords on subsutural ramp of last and penultimate whorls. Numerous thin and indistinct growth lines. Shell base rounded, medium convex, quickly constricting and passing into medium long, slightly sinuous canal. Narrow, elongate-oval aperture, poorly differentiated from canal, inner lip weakly convex, nearly straight. Columellar and parietal sides with narrow, distinct white callus. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA. Not examined.</p><p>DNA diagnosis (based on 2 cox 1 sequences)</p><p>‘C’ in site 232, ‘G’ in site 382, ‘G’ in site 502, ‘C’ in site 652.</p><p>Remarks</p><p>The species is very similar to L. modicae sp. nov., which nevertheless attains a larger size (up to 31.8 mm vs 24 mm in L. maestratii sp. nov.). The new species differs in more closely spaced axial folds and relatively broader spiral cords below shoulder, similar in width to those on the subsutural ramp. In the holotype, the number of cords on the last whorl below the subsutural ramp is 44, while in the similarlysized specimen of L. modicae (IM-2013-52093, SL 23.3 mm) the number of cords is 65.</p><p>The molecular phylogenetic analysis demonstrated that these species are not closely related.</p><p>Distribution</p><p>Solomon Is., 970–1045 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFFC3D2B906BFE1E33BD9896	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFFD3D2993F9FD7431BE9C56.text	03FCE539FFFD3D2993F9FD7431BE9C56.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx breviplicata (E. A. Smith 1899) Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx breviplicata (E.A. Smith, 1899) comb. nov.</p><p>Figs 20H, 26A–K</p><p>Pleurotoma (Surcula) breviplicata E.A. Smith, 1899: 238–239 .</p><p>Pleurotoma (Surcula) breviplicata – Annandale &amp; Stewart 1909: pl. 9 fig. 3–3a.</p><p>Comitas breviplicata – Powell 1969: 272 (23-284), pl. 219 figs 3–4. — Kosuge 1992: 165, fig. 2, pl. 58 fig. 4.</p><p>Type material</p><p>Holotype ANDAMAN ISLANDS • SL 25.1 mm; 13°17′15″ N, 93°10′ E; depth 185 ftm (= 338 m); ZSI, M 923/1.</p><p>Material examined (sequenced)</p><p>SOLOMON ISLANDS • 1 lv; NW of Santa Isabel I.; 7°39′ S, 157°43′ E; depth 495–650 m; SALOMON 2, stn CP2213; MNHN-IM-2007-35063 • 1 lv; Choiseul; 6°39′ S, 156°14′ E; depth 490– 520 m; SALOMON 2, stn CP2226; MNHN-IM-2009-16803 • 1 lv; Choiseul; 6°37′ S, 156°13′ E; depth 508–522 m; SALOMON 2, stn CP2227; MNHN-IM-2007-42499 • 5 lv; Choiseul; 6°35′ S, 156°11′ E; depth 609–625 m; SALOMON 2, stn CP2228; MNHN-IM-2007-17933, MNHN-IM-2007-42525 to MNHN-IM-2007-42527, MNHN-IM-2009-16786 • 2 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=156.85&amp;materialsCitation.latitude=-7.9166665" title="Search Plazi for locations around (long 156.85/lat -7.9166665)">Vella Gulf</a>; 7°55′ S, 156°51′ E; depth 485– 520 m; SALOMON 2, stn CP2263; MNHN-IM-2009-16810, MNHN-IM-2009-16814 . • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=157.36667&amp;materialsCitation.latitude=-8.633333" title="Search Plazi for locations around (long 157.36667/lat -8.633333)">Rendova</a>; 8°38′ S, 157°22′ E; depth 195–197 m; SALOMON 2, stn CP2284; MNHN-IM-2009-16788 .</p><p>SOLOMON SEA • 1 lv; SE of Tuam Is; 6°04′ S, 148°12′ E; depth 500–575 m; PAPUA NIUGINI, stn CP4009; MNHN-IM-2013-19930 • 1 lv; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=149.28334&amp;materialsCitation.latitude=-6.133333" title="Search Plazi for locations around (long 149.28334/lat -6.133333)">Ainto Bay</a>; 6°08′ S, 149°17′ E; depth 410–614 m; MADEEP, stn CP4338; MNHN-IM-2013-46381 .</p><p>Description</p><p>SHELL. Medium-sized, nearly reaching 50 mm, thin but strong, narrow fusiform, with high spire, from off-white to light cream. Small paucispiral protoconch of 1.5–1.75 strongly convex microshagreened whorls. Protoconch-teleoconch transition indistinct, marked by appearance of definitive sculpture. Teleoconch whorls obtusely angular on shoulder, subsutural ramp weakly to moderately concave, in larger specimens nearly flat on last whorl. Distinct, impressed suture. 13–14 strong oblique axial folds on and below shoulder on last whorl in specimens with SL over 40 mm. Folds mostly do not reach lower suture on teleoconch whorls, disappear shortly below shoulder, rarely extend to periphery. Well-developed spiral sculpture. 3–5 variously developed spiral cords on subsutural ramp, on upper whorls below ramp thin cords separated by intervals exceeding the cords’ width, on last and penultimate whorls cords relatively broader with intervals narrower than cords. Immediately on shoulder 4–5 more narrow cords, crossing folds and distinct on their summits, below shoulder spiral cords broadly-spaced, with intervals 1–3 times as wide as cords. On shell base and canal cords more closely spaced and broader than on periphery. 30–37 cords on last whorl below shoulder. Shell base weakly to strongly convex, gradually or rapidly narrows passing into long sinuous canal. Narrow elongate-oval aperture, well differentiated from canal. Well-developed white columellar and parietal callus. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULAE (Fig. 20H; examined in MNHN-IM-2007-42499, MNHN-IM-2007-17933, MNHN-IM-2007-42526, MNHN-IM-2007-35063, MNHN-IM-2009-16810). comprising 25–38 rows of teeth, 8–12 nascent. Marginal teeth similar in studied specimens, duplex, ~370–415 µm in length (3.4–3.5% AL without canal). Major limb narrow to medium lanceolate in dorsal view, strongly curved. Accessory limb about half of tooth width, inserted into distinct socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 10 cox 1 sequences)</p><p>‘G’ in site 148, ‘C’ in site 346, ‘G’ in site 388, ‘T’ in site 517.</p><p>Remarks</p><p>Most ASAP partitions (Supp. file 2) suggest the presence of two molecularly distinct sister PSHs within L. breviplicata . However, in the BA tree (Supp. file 1), one of the two PSHs is not monophyletic. Both PSHs have nearly identical shells, with no clear boundary to distinguish them. As a result, we treat these PSHs as a single species. This species shows considerable variability in shell slenderness, but its spiral sculpture pattern is consistent, characterized by distinct, broadly-spaced cords on the periphery and most of the shell base.</p><p>We tentatively apply the name breviplicata to this species. First, the holotype is much smaller (SL 26 mm) than our specimens, although it may represent an immature individual. Second, the holotype was described from the Andaman Is., whereas all our specimens were collected from the Solomon Is. and Papua New Guinea. Nonetheless, Kosuge (1992) illustrated a dead shell collected off Western Australia (18°40′ S, 117°13′ E, 396–398 m), an intermediate locality, which closely resembles both the holotype and our specimens. This shell is larger than the holotype (SL 40.7 mm), comparable in size to our specimens. Therefore, we consider L. breviplicata to be a broadly distributed species, found at depths of 195– 609 m.</p><p>This species is well differentiated from its congeners by its spiral sculpture pattern, yet it closely resembles L. kirai (Powell, 1969), Leucosyrtinx sp. 26 and Leucosyrinx sp. 7 (see below for comparative remarks).</p><p>Distribution</p><p>From Andaman Is., to Western Australia and Solomon Is., 195– 609 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFFD3D2993F9FD7431BE9C56	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFE13D37909AFBC237269FF1.text	03FCE539FFE13D37909AFBC237269FF1.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx undefined-4	<div><p>Leucosyrinx sp. 4</p><p>Fig. 27G–H</p><p>Material examined (sequenced)</p><p><a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=148.2&amp;materialsCitation.latitude=-6.0666666" title="Search Plazi for locations around (long 148.2/lat -6.0666666)">SOLOMON SEA</a> • 1 lv; SE of Tuam Is; 6°04′ S, 148°12′ E; depth 500–575 m; PAPUA NIUGINI, stn CP4009; MNHN-IM-2013-19929 (sympatric with sp. 6)</p><p>DNA diagnosis (based on 1 (!) cox 1 sequence)</p><p>‘C’ in site 145, ‘C’ in site 151, ‘C’ in site 367, ‘G’ in site 403.</p><p>Remarks</p><p>This molecularly distinct species is represented in our material by a single specimen. It is conchologically nearly identical and sympatric to Leucosyrinx sp. 7 . Nevertheless in Leucosyrinx sp. 4 the spiral cords are less distinct than in Leucosyrinx sp. 7, and the two species are phylogenetically not closely related.</p></div>	https://treatment.plazi.org/id/03FCE539FFE13D37909AFBC237269FF1	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFE13D37909AFECA339A99DF.text	03FCE539FFE13D37909AFECA339A99DF.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx undefined-7	<div><p>Leucosyrinx sp. 7</p><p>Figs 2, 27A–B</p><p>Material examined (sequenced)</p><p><a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=148.2&amp;materialsCitation.latitude=-6.0666666" title="Search Plazi for locations around (long 148.2/lat -6.0666666)">SOLOMON SEA</a> • 1 lv; SE of Tuam Is; 6°04′ S, 148°12′ E; depth 500–575 m; PAPUA NIUGINI, stn CP4009; MNHN-IM-2013-19933 .</p><p>Description</p><p>RADULA (Fig. 2). Typical of the genus. Marginal teeth ~370 µm in length (5.2% AL without canal).</p><p>DNA diagnosis (based on 1 (!) cox 1 sequence)</p><p>‘G’ in site 52, ‘G’ in site 265, ‘G’ in site 569.</p><p>Remarks</p><p>This molecularly distinct species is represented by a single specimen in our material. Conchologically it is indistinguishable from some specimens of L. breviplicata and Leucosyrinx sp. 26. From the latter it also differs in the presence of a slightly darker spiral band on the shoulder. It co-occurs with Leucosyrinx sp. 26 in the Solomon Sea (collected at neighbouring stations with the difference of only two minutes of longitude). Leucosyrinx sp. 7 is sister species to Leucosyrinx sp. 26, but both species are separated in all the ASAP partitions.</p></div>	https://treatment.plazi.org/id/03FCE539FFE13D37909AFECA339A99DF	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFE13D34909AF9DC36CC9B77.text	03FCE539FFE13D34909AF9DC36CC9B77.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx undefined-6	<div><p>Leucosyrinx sp. 6</p><p>Figs 27I–J, 29D–E</p><p>Material examined (sequenced)</p><p>SOLOMON ISLANDS • 1 lv; E of Malaita; 8°43′ N, 161°00′ E; depth 314–410 m; SALOMONBOA 3, stn CP2798; MNHN-IM-2009-6036 .</p><p>Description</p><p>RADULA (Fig. 29D–E). Comprising about 30 rows of teeth, 8 nascent. Marginal teeth duplex, ~255 µm in length (5.8% AL without canal). Major limb narrow lanceolate in dorsal view, strongly curved. Accessory limb about half of tooth width, ~0.75 of total tooth length, inserted into distinct deep socket on dorsal side of major limb.</p><p>Remarks</p><p>This molecularly distinct species is represented in our material by a single specimen. It is conchologically nearly identical to Leucosyrinx sp. 7, although significantly smaller (SL 15.2 mm).</p></div>	https://treatment.plazi.org/id/03FCE539FFE13D34909AF9DC36CC9B77	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFE23D35905EFE54308A9BD5.text	03FCE539FFE23D35905EFE54308A9BD5.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx lozoueti Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx lozoueti sp. nov.</p><p>urn:lsid:zoobank.org:act: 1B0E60BD-7739-4FC1-A42C-A3919160655E</p><p>Figs 28A–G, 29A</p><p>Etymology</p><p>The species is named after Pierre Lozouet from MNHN, world known expert on Recent and fossil molluscs and responsible for the marine invertebrate collection of the MNHN.</p><p>Material examined</p><p>Holotype (sequenced) NEW CALEDONIA • SW of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=167.28334&amp;materialsCitation.latitude=-22.883333" title="Search Plazi for locations around (long 167.28334/lat -22.883333)">Ile des Pins</a>; 22°53′ S, 167°17′ E; depth 530–545 m; KANACONO, stn DW4666; MNHN-IM-2013-68662.</p><p>Other material (sequenced)</p><p>NEW CALEDONIA • 2 lv; same data as for holotype; MNHN-IM-2013-68075, MNHN-IM-2013-68076 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 9.2 mm, AL (with canal) 4.7 mm, AL (without canal) 3.3 mm, SW 3.4 mm.</p><p>SHELL (holotype). Shell small, slender, fusiform, with high spire, very light tan, thin, glossy. Small paucispiral protoconch, of about 1.75 smooth, bulbous, light-brown whorls. Protoconch-teleoconch transition hardly discernible, marked by appearance of definitive sculpture. Slightly over 4.5 distinctly angular on shoulder teleoconch whorls, subsutural ramp evenly strongly concave on all whorls. Distinct impressed suture. 14–15 strong, slightly oblique, dense axial folds on and shortly below shoulder on last and penultimate whorls. Folds reach lower suture on teleoconch whorls, gradually diminish on last whorl towards aperture, although still present. Well-developed spiral sculpture of similar width, narrow, low, rounded, wavy cords over entire shell, including subsutural ramp. 5 slightly broader cords below suture on last whorl and 4 on penultimate one, about 30 wavy cords below shoulder on last whorl. Intervals between cords narrower than cords’ width in most cases. Shell base weakly convex, slowly passing in medium long straight canal. Narrow-oval aperture well differentiated from canal. Columellar and parietal callus well-developed, of same color as remaining shell. Medium deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 29A; examined in MNHN-IM-2013-68076). Comprising around 32 rows of teeth, 6 nascent. Marginal teeth duplex, ~130 µm in length (5.4% AL without canal). Major limb medium broad lanceolate in dorsal view, weakly curved. Accessory limb about half of tooth width, of the same width along entire length, ~0.7 of total tooth length, inserted into distinct socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 3 cox 1 sequences)</p><p>‘C’ in site 142, ‘G’ in site 592, ‘T’ in site 625.</p><p>Remarks</p><p>The species is known from three specimens collected at the same station and exibits moderate variation in shell shape. From similar in size L. nodulocordata sp. nov. it is well differentiated by the spiral sculpture pattern, having much narrower and closer spaced cords.</p><p>This is the smallest species of Leucosyrinx, not reaching 10 mm in SL. The only anatomically studied specimen (MNHN-IM-2013-68076) appeared to be a female with a well-developed pallial gonoduct, suggesting that it reached sexual maturity.</p><p>Distribution</p><p>The species is known from the type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFE23D35905EFE54308A9BD5	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFE43D339077FECA30C69BDE.text	03FCE539FFE43D339077FECA30C69BDE.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx nodulocordata Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx nodulocordata sp. nov.</p><p>urn:lsid:zoobank.org:act: 69EE0101-26EA-479D-B457-91403D1CEFCC</p><p>Fig. 28H–L</p><p>Etymology</p><p>From Latin ‘ nodulus ’ – ‘little knot, swelling‘ and ‘ corda ’ – ‘rope, cord’, referring to the nodules, present on major spiral cords on last whorl.</p><p>Material examined</p><p>Holotype (sequenced) SOLOMON SEA • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=146.21666&amp;materialsCitation.latitude=-5.6" title="Search Plazi for locations around (long 146.21666/lat -5.6)">Dampier Strait</a>; 5°36′ S, 146° 13′ E; depth 620–780 m; PAPUA NIUGINI, stn CP4013; MNHN-IM-2013-9752.</p><p>Additional material (sequenced)</p><p>PHILIPPINES • 1 lv; off Balicasag I., 9°30′ N, 123°42′ E; depth 356–396 m; PANGLAO 2005, stn CP2393; MNHN-IM-2007-42471 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 10.4 mm, AL (with canal) 5.4 mm, AL (without canal) 2.9 mm, SW 3.6 mm.</p><p>SHELL (holotype). Shell small, slender, narrowly fusiform, with medium high spire, off-white, thin, translucent, fragile. Small paucispiral protoconch of about 1.5 smooth microshagreened yellow whorls. Protoconch-teleoconch transition marked by appearance of anal sinus and obtuse medial keel, corresponding to shoulder on later whorls. 6 distinctly angular teleoconch whorls on shoulder with evenly moderately concave subtural ramp on all whorls subsutural ramp. Distinct, shallowly impressed suture. 13 and 12 on last and penultimate whorls strong, slightly oblique axial folds, present on and below shoulder, reaching lower suture on teleoconch whorls. Spiral sculpture of few rather strong cords bellow shoulder, one immediately below shoulder, crossing axial folds, below two similar in strength narrow cords with intervals 4–5 times as broad as cords’ width, forming oval nodules on intersections with lower parts of axial folds. Between cords axial folds not pronounced. Shell base and siphonal canal with 15 more closely spaced cords, with intervals 1–2 times cords’ width. Cords’ width same as of nodulated ones. Subsutural ramp smooth. Shell base weakly convex, slowly passing into long weakly curving canal. Narrow-oval aperture poorly differentiated from canal. Columellar and parietal callus thin, of same color as remaining shell. Medium deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip. Operculum narrow leaf-shaped, with terminal nucleus.</p><p>RADULA (examined in MNHN-IM- 2007-42471). Typical of the genus. Marginal teeth duplex, ~150 µm in length (5.5% AL without canal).</p><p>DNA diagnosis (based on 2 cox 1 sequences)</p><p>‘C’ in site 205, ‘A’ in site 370, ‘A’ in site 565.</p><p>Remarks</p><p>Only two specimens of this species were available. The ASAP analysis suggests the presence of two independent sister PSHs included within L. nodulocordata sp. nov.; however, due to the strong similarity in shell morphology, we consider the molecular differences to be geographically related.</p><p>The second specimen lacks part of the canal, which makes the shell appear more stout. Additionally, only the upper subshoulder keel is nodulated, while the second keel is smooth.</p><p>This new species is unique due to the presence of nodulated spiral cords below the shoulder, a feature not found in any other species of Leucosyrinx . We are uncertain if the specimens are fully grown, as the larger specimen (holotype) consists of only six teleoconch whorls – a very low number for Leucosyrinx .</p><p>Distribution</p><p>Solomon Is. to Philippines, 356– 620 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFE43D339077FECA30C69BDE	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFE53D33909AFE3D370A9EEF.text	03FCE539FFE53D33909AFE3D370A9EEF.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx undefined-5	<div><p>Leucosyrinx sp. 5</p><p>Figs 28N–O, 29B</p><p>Material examined (sequenced)</p><p>PAPUA NEW GUINEA • 1 lv; off Lancasay Is., 8°16′ S, 150°29′ E; depth 340–358 m; BIOPAPUA, stn CP3732; MNHN-IM-2009-17198 .</p><p>Description</p><p>RADULA (Fig. 29B). Comprising around 25 rows of teeth, 12 nascent. Marginal teeth duplex, ~120 µm in length (4% AL without canal). Major limb medium broad lanceolate in dorsal view, curved. Accessory limb over half of tooth width, ~0.75 of total tooth length, inserted into distinct socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 1 (!) cox 1 sequence)</p><p>‘C’ in site 5, ‘C’ in site 360, ‘T’ in site 390, ‘T’ in site 417.</p><p>Remarks</p><p>This small (SL 10.8 mm) species is represented by a single, probably immature, specimen. It is somewhat similar to L. nodulocordata sp. nov. in the presence of nodules on spiral cords. The cords, nevertheless, are much more numerous and closer spaced below the shoulder on the last whorl. Besides, the shell is slenderer and the axial folds are much more numerous. The two species are phylogenetically not closely related.</p></div>	https://treatment.plazi.org/id/03FCE539FFE53D33909AFE3D370A9EEF	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFE53D33909AFAD3302E9D04.text	03FCE539FFE53D33909AFAD3302E9D04.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx undefined-9	<div><p>Leucosyrinx sp. 9</p><p>Fig. 28M</p><p>Material examined (sequenced)</p><p>NEW CALEDONIA • 1 lv; SW of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=167.28334&amp;materialsCitation.latitude=-22.883333" title="Search Plazi for locations around (long 167.28334/lat -22.883333)">Ile des Pins</a>; 22°53′ S, 167°17′ E; depth 530–545 m; KANACONO, stn DW4666; MNHN-IM-2013-68714 .</p><p>DNA diagnosis (based on 1 (!) cox 1 sequence)</p><p>‘G’ in site 76, ‘C’ in site 325, ‘A’ in site 368.</p><p>Remarks</p><p>The molecularly distinct species is represented in our material by a single juvenile specimen of SL 5.7 mm. It was collected in the same haul as L. lozoueti sp. nov. and is rather similar to it, although phylogenetically not closely related.</p></div>	https://treatment.plazi.org/id/03FCE539FFE53D33909AFAD3302E9D04	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFE53D319016F8EA31379C3C.text	03FCE539FFE53D319016F8EA31379C3C.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx archibenthalis Powell 1969	<div><p>Leucosyrinx archibenthalis Powell, 1969</p><p>Figs 29C, 30</p><p>Leucosyrinx (Sibogasyrinx) archibenthalis Powell, 1969: 344 (23-412), pl. 264 figs 6–7.</p><p>Sibogasyrinx archibenthalis – Kantor &amp; Puillandre 2021: 35, fig. 3r–t.</p><p>Type material</p><p>Holotype PHILIPPINES • Mindanao I., <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=124.04694&amp;materialsCitation.latitude=8.279166" title="Search Plazi for locations around (long 124.04694/lat 8.279166)">Iligan Bay</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=124.04694&amp;materialsCitation.latitude=8.279166" title="Search Plazi for locations around (long 124.04694/lat 8.279166)">Tabu Point</a>; 08°16′45″ N, 124°02′49″ E; depth 924 m; RV Albatross, stn 5513; USNM 238773.</p><p>Material examined (all sequenced)</p><p><a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=143.06667&amp;materialsCitation.latitude=-3.1833334" title="Search Plazi for locations around (long 143.06667/lat -3.1833334)">BISMARCK SEA</a> • 2 lv; W of Tarawai Is; 3°11′ S, 143°04′ E; depth 510–560 m; PAPUA NIUGINI, stn CP4069; MNHN-IM-2013-19304, MNHN-IM-2013-19308 .</p><p>PAPUA NEW GUINEA • 1 lv; Manus I.; 2°14′ N, 147°16′ E; depth 611–618 m; BIOPAPUA, stn CP3690; MNHN-IM-2009-17060 .</p><p>PHILIPPINES • 1 lv; Luzon I.; 15°52′ N, 121°49′ E; depth 506–542 m; AURORA 2007, stn CP2660; MNHN-IM-2009-13333 • 1 lv; Luzon I.; 16°00′ N, 121°51′ E; depth 431–442 m; AURORA 2007, stn CP2735; MNHN-IM-2009-13459 .</p><p>SOLOMON ISLANDS • 1 lv; NW of Santa Isabel I.; 7°39′ S, 157°43′ E; depth 495–650 m; SALOMON 2, stn CP2213; MNHN-IM-2009-16808 .</p><p>Description</p><p>SHELL. Medium-sized, reaching nearly 45 mm, rather solid, fusiform, nearly biconical, with high spire, from greyish to light brownish. Paucispiral small glossy protoconch, of about 1.75 whorls. Teleoconch whorls very weakly angular on shoulder, with nearly flat subsutural ramp. Suture impressed. Distinct, oblique, axial folds on shoulder, 16–18 on penultimate whorl. Folds reach lower suture on upper whorls, can be limited to rounded knobs situated just above lower suture. Folds gradually weaken on later part of penultimate whorl and absent on last whorl in larger specimens. Well-developed spiral sculpture of similar width, narrow, low, rounded, slightly wavy cords, well pronounced over entire shell. Intervals between cords narrower than cords’ width. On subsutural ramp cords broader and less sinuous than those below shoulder. Shell base weakly to medium convex gradually passing into medium-long straight canal. Narrow elongate-oval aperture, poorly differentiated from canal. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.</p><p>RADULA (Fig. 29C; examined in MNHN-IM-2009-13333). Comprising around 35 rows of teeth, 15 nascent. Marginal teeth duplex, ~220 µm in length (2.0% AL without canal). Major limb medium broad lanceolate in dorsal view, weakly curved. Accessory limb less than half of tooth width, of same width along entire length, ~0.8 of total tooth length, inserted into distinct deep ocket on dorsal side of major limb.</p><p>DNA diagnosis (based on 6 cox 1 sequences)</p><p>‘C’ in site 50, ‘A’ in site 88, ‘G’ in site 166, ‘A’ in site 304, ‘G’ in site 490.</p><p>Remarks</p><p>This species was previously known from the holotype collected off Mindanao, Philippines. Our specimens were collected from the Philippines and Papua New Guinea, albeit at shallower depths of 430–611 m compared to 924 m for the holotype. The holotype is slightly slenderer than our specimens, but this characteristic, as well as the degree of angulation of the shoulder, is subject to intraspecific variability, as confirmed by our sequenced specimens.</p><p>Previosuly, the species was assigned to Sibogasyrinx, including in the latest revision of the genus (Kantor &amp; Puillandre 2021). Nevertheless, the holotype lacks the diagnostic character of Sibogasyrinx – the subsutural row of knobs – and therefore can not be attributed to the genus. The newly sequenced material as well as the radular morphology confirmed its position within Leucosyrinx .</p><p>The species resembles the specimens of L. farhatorum sp. nov. from Vanuatu (Fig. 4N–P), and they are sister species; however, L. archibenthalis differs in having a broader shell with a more angular shoulder.</p><p>Distribution</p><p>Philippines, Papua New Guinea, Bismarck Sea, 431– 924 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFE53D319016F8EA31379C3C	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFE73D3C9057F9A3308A9962.text	03FCE539FFE73D3C9057F9A3308A9962.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx placaisae Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx placaisae sp. nov.</p><p>urn:lsid:zoobank.org:act: DB43FF29-2D14-4ECF-8D2D-8975A115C0EC</p><p>Figs 29F, 31A–F</p><p>Etymology</p><p>The species is named after Danielle Plaçais, a volunteer in the molluscan team of MNHN of many years.</p><p>Material examined</p><p>Holotype (sequenced) INDIAN OCEAN • Walters Shoal; 33°55′ S, 44°03′ E; depth 1588–1714 m; MD208 (Walters Shoal), stn CP4914; MNHN-IM-2013-48114 .</p><p>Other material (sequenced)</p><p>INDIAN OCEAN • 1 lv; same data as for holotype; MNHN-IM-2013-48112 .</p><p>Description</p><p>MEASUREMENTS (holotype). SL 29.9 mm, AL (with canal) 15.7 mm, AL (without canal) 9.1 mm, SW 11.2 mm.</p><p>SHELL (holotype). Shell medium-sized, slender, fusiform, with medium high spire, light yellow-orange, shell base and canal lighter colored. Protoconch missing. 6.5 remaining distinctly angular on shoulder teleoconch whorls, with subsutural ramp strongly concave on all whorls. Distinct, shallowly impressed suture. 15 strong, oblique axial folds on and below shoulder on last whorl and 12 on penultimate whorl. Folds fade on subsutural ramp, reach lower suture on teleoconch whorls, extend to last whorl periphery and upper shell base. Relatively distinct spiral sculpture of similar in width, slightly sinuous cords over entire shell surface, including subsutural ramp. Intervals between cords narrower than cords’ width. 10 cords on subsutural ramp of last whorl. Shell base moderately convex, rapidly narrowing towards medium long weakly curving canal. Narrow-oval aperture, poorly differentiated from canal. Thin columellar and parietal callus of same color as remaining shell. Moderately deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip. Operculum oval leaf-shaped, with a terminal nucleus.</p><p>RADULA (Fig. 29F; studied in MNHN-IM-2013-48112). Marginal teeth duplex, ~250 µm in length (4.6% of AL without canal). Major limb narrowly lanceolate, slightly curved. Accessory limb nearly twice as narrow, ~0.75 of total tooth length, inserted into shallow but distinct socket on dorsal side of major limb.</p><p>DNA diagnosis (based on 2 cox 1 sequences)</p><p>‘C’ in site 59, ‘C’ in site 250, ‘T’ in site 328.</p><p>Remarks</p><p>The species is represented in our material by two specimens only. The second specimen is smaller than the holotype (SL 18.6 mm), and differs in a relatively broader shell and paler coloration.</p><p>The species is most similar to L. exulans, differing in a lower spire as well as in a more angulated shoulder. The shell of the new species is also much paler than that of L. exulans . Both species are phylogenetically not closely related.</p><p>Distribution</p><p>The species is known from the type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFE73D3C9057F9A3308A9962	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFEA3D3D901BF94330679889.text	03FCE539FFEA3D3D901BF94330679889.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx aequatorialis Thiele 1925	<div><p>Leucosyrinx aequatorialis Thiele, 1925</p><p>Fig. 32A</p><p>Leucosyrinx aequatorialis Thiele, 1925: 182 (216), pl. 23(35) fig. 22.</p><p>Comitas aequatorialis – Powell 1969: 282 (23-294), pl. 224 fig. 3.</p><p>Type material</p><p>Holotype INDIAN OCEAN • off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=45.708332&amp;materialsCitation.latitude=1.8033333" title="Search Plazi for locations around (long 45.708332/lat 1.8033333)">East Africa</a>; 1°48.2′ N, 45°42.5′ E; depth 1644 m; ZMB.</p><p>Remarks</p><p>The species is known only from the immature holotype (SL 13 mm).</p><p>The shell shape, sculpture pattern, and the shape of the subsutural anal sinus fit well within the variability observed in the species of Leucosyrinx as defined here. The lack of the nodules on the shoulder of the last whorl is a character found in different species of Leucosyrinx . Given that the anal sinus shape aligns more closely with species of Leucosyrinx than with Comitas, we propose transferring the species to the former genus.</p><p>Distribution</p><p>Known only from type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFEA3D3D901BF94330679889	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFEB3D3D93DFFD7433889FBB.text	03FCE539FFEB3D3D93DFFD7433889FBB.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx anteridion (Watson 1881)	<div><p>Leucosyrinx anteridion (Watson, 1881) comb. nov.</p><p>Fig. 32B</p><p>Pleurotoma (Surcula) anteridion Watson, 1881: 399 .</p><p>Pleurotoma (Surcula) anteridion – Watson 1886: 295, pl. 19 fig. 6.</p><p>Surcula anteridion – Thiele 1925: 188 (222), pl. 24(36) fig. 13.</p><p>Comitas anteridion – Powell 1969: 273 (23-285), pl. 219 fig. 5.</p><p>Type material</p><p>Holotype SOUTH AFRICA • off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=18.616667&amp;materialsCitation.latitude=-34.066666" title="Search Plazi for locations around (long 18.616667/lat -34.066666)">Cape of Good Hope</a>; 34°04′ S, 18°37′ E; depth 150 ftm (= 274 m); HMS Challenger stn 142; NHMUK, NHMUM 1887.2.9.977.</p><p>Remarks</p><p>The shell shape, sculpture pattern, and the shape of the subsutural anal sinus fit well within the variability observed in the species of Leucosyrinx as defined here. Given that the anal sinus shape aligns more closely with species of Leucosyrinx than with Comitas, we propose transferring the species to the former genus.</p><p>Distribution</p><p>Off South Africa, 270– 420 m. The record of Thiele (1925) from New Amsterdam, South Indian Ocean requires confirmation.</p></div>	https://treatment.plazi.org/id/03FCE539FFEB3D3D93DFFD7433889FBB	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFEB3D3B93DCFA2731B498FF.text	03FCE539FFEB3D3B93DCFA2731B498FF.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx arcana (E. A. Smith 1899)	<div><p>Leucosyrinx arcana (E.A. Smith, 1899) comb. nov.</p><p>Fig. 32C</p><p>Pleurotoma (Surcula) arcana E.A. Smith, 1899: 239 .</p><p>Pleurotoma (Surcula) arcana – Annandale &amp; Stewart 1909: pl. 9 figs 6, 6a.</p><p>Comitas arcana – Powell 1969: 272 (23-284), pl. 219 figs 6–7, with query. — Tan &amp; Islami 2021: 325, fig. 9a.</p><p>Type material</p><p>Syntypes</p><p>ANDAMAN ISLANDS • 1 spec.; off Andaman Is.; 13°17′15″ N, 93°10′ E; depth 185 ftm (= 340 m); ZSI, M 926/1 • 1 spec.; off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=75.63333&amp;materialsCitation.latitude=9.492778" title="Search Plazi for locations around (long 75.63333/lat 9.492778)">Travancore coast</a>; 9°29′34″ N, 75°38′ E; depth 360 ftm (= 660 m); ZSI, M 926/1 .</p><p>Remarks</p><p>Judging from the illustration in Annandale &amp; Stewart (1909) the shell is rather similar to some of the molecularly confirmed species of Leucosyrinx, e.g., L. quinetae sp. nov. (Fig. 24) and some specimens of L. luzonica (Fig. 23). The position of the anal sinus, occupying the entire subsutural ramp, suggests the inclusion in Leucosyrinx rather than in Comitas and we transfer the species to Leucosyrinx .</p><p>Sysoev (1996: figs 46–47) illustrated two specimens from the Gulf of Oman and the Gulf of Aden, identified by him as Comitas paupera (see below), which are very similar to the type of L. arcana and probably belong to this species. These specimens were collected at significantly larger depths, 1890– 2000 m. This assumption is based only on the shell characters and needs confirmation by anatomical and molecular data.</p><p>Distribution</p><p>From Gulf of Aden to Andaman Is. and Indonesia from 340 to 2000 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFEB3D3B93DCFA2731B498FF	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFED3D3B93D1FCE333159FBC.text	03FCE539FFED3D3B93D1FCE333159FBC.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx curviplicata (Sysoev 1996)	<div><p>Leucosyrinx curviplicata (Sysoev, 1996) comb. nov.</p><p>Fig. 32D</p><p>Comitas curviplicata Sysoev, 1996: 10, fig. 29.</p><p>Type material</p><p>Holotype INDIAN OCEAN • Gulf of Aden; depth 1270 m; John Murray Expedition, stn 184; NHMUK 1993092.</p><p>Paratype</p><p>INDIAN OCEAN • 1 spec., same data as for holotype; NHMUK 1993093 .</p><p>Remarks</p><p>According to the subsutural position and shape of the anal sinus that occupies entire subsutural ramp, the species should be transferred to Leucosyrinx . It resembles Leucosyrinx sp. 20 (Fig. 11I), differing in the shorter spire.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFED3D3B93D1FCE333159FBC	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFED3D3893C7FA233095983A.text	03FCE539FFED3D3893C7FA233095983A.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx diomedea (Powell 1969) Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx diomedea (Powell, 1969) comb. nov.</p><p>Fig. 23J–L</p><p>Comitas thisbe diomedea Powell, 1969: 277 (23-289), pl. 225 figs 3–4.</p><p>Type material</p><p>Holotype SULAWESI • Celebes (Sulawesi), off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=121.48333&amp;materialsCitation.latitude=-4.895833" title="Search Plazi for locations around (long 121.48333/lat -4.895833)">Tg. Lamulul</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=121.48333&amp;materialsCitation.latitude=-4.895833" title="Search Plazi for locations around (long 121.48333/lat -4.895833)">Gulf of Boni</a>; 04°53′45″ S, 121°29′ E; depth 540 ftm (= 987 m); Albatross stn 5650; USNM 239425.</p><p>Remarks</p><p>The species is known from two specimens, collected off Sulawesi, Indonesia. It is rather similar to L. luzonica, differing in the more gradual narrowing of the last whorl towards the canal. It may represent a form of L. luzonica, but due to very limited material on both species, we are taking a conservative approach and consider it a separate species. Conchologically, it is very different from L. thisbe (Fig. 17A– E) in that its axial folds do not extend to the shell base, it has weaker spiral sculpture, lacks a subsutural fold, and has a slenderer shell. Therefore, we consider it a valid species.</p><p>Kosuge (1992: pl. 59 figs 6–7) illustrated a very slender specimen under this name, the identity of which cannot be determined with certainty based on the provided photograph. The radular drawing (Kosuge 1992: figs 17–21) shows duplex marginal teeth, which are typical of Leucosyrinx .</p><p>Distribution</p><p>Sulawesi to (?) western Australia, 496– 987 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFED3D3893C7FA233095983A	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFEE3D389060FDA133159F79.text	03FCE539FFEE3D389060FDA133159F79.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx herilda (Dall 1908)	<div><p>Leucosyrinx herilda (Dall, 1908)</p><p>Fig. 33F</p><p>Gemmula herilda Dall, 1908: 266 .</p><p>Leucosyrinx herilda – McLean 1971b: sp. 1670.</p><p>Type material</p><p>Holotype GULF OF PANAMA • depth 1672 ftm (= 3057 m); USNM 123091.</p><p>Remarks</p><p>The holotype of the species is a dead-collected incomplete shell (SL 18+ mm). Judging from the growth lines, the shape of the anal sinus corresponds to that of other species of Leucosyrinx . Therefore, we confirm its generic position in Leucosyrinx, as was suggested by McLean (1971b).</p><p>The species is very similar to Leucosyrinx powelli (Rehder &amp; Ladd, 1973) collected at Agassiz Guyot in the central Pacific albeit at shallower depths (1581–1617 m). Both species can be conspecific, but due to the large distance between the type localities and large difference in depths, we presently consider them as two separate species.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFEE3D389060FDA133159F79	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFEE3D3993DEFA653141981B.text	03FCE539FFEE3D3993DEFA653141981B.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx eurina (E. A. Smith 1899)	<div><p>Leucosyrinx eurina (E.A. Smith, 1899) comb. nov.</p><p>Fig. 32E</p><p>Pleurotoma (Surcula) eurina E.A. Smith, 1899: 239 .</p><p>Pleurotoma (Surcula) eurina – Annandale &amp; Stewart 1909: pl. 9 figs 4, 4a.</p><p>Comitas eurina – Powell 1969: 268 (23-280), pl. 217 figs 4–5. — Tan &amp; Islami 2021: 325, fig. 9b.</p><p>Type material</p><p>Holotype INDIAN OCEAN • Travancore coast; depth 430 ftm (= 790 m); Investigator, stn 232; ZSI, M 647/1.</p><p>Paratype</p><p>INDIAN OCEAN • 1 spec.; same data as for holotype; NHMUK 1904.6.15.139 .</p><p>Remarks</p><p>The shell of L. eurina is unusual for the genus due to the distinct subsutural spiral fold, a feature somewhat similar to what is observed in our sequenced specimen of L. thisbe (Fig. 17C–E). On the other hand, the anal sinus is subsutural and occupies entire subsutural ramp, thus suggesting the transfer of the species from Comitas to Leucosyrinx .</p><p>Distribution</p><p>From off southern India to Indonesia, 790– 940 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFEE3D3993DEFA653141981B	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFEF3D3993FAFD8230609EA7.text	03FCE539FFEF3D3993FAFD8230609EA7.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx granuloplicata (Kosuge 1992)	<div><p>Leucosyrinx granuloplicata (Kosuge, 1992) comb. nov.</p><p>Fig. 12G</p><p>Comitas granuloplicata Kosuge, 1992: 166, pl. 58 fig. 9.</p><p>Type material</p><p>Holotype WESTERN AUSTRALIA • off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=118.416664&amp;materialsCitation.latitude=-17.966667" title="Search Plazi for locations around (long 118.416664/lat -17.966667)">Port Hedland</a>; 17°58′ S, 118°25′ E; depth 376 m; WAM S14436.</p><p>Remarks</p><p>The species was described based on two specimens. However, only the holotype, which is a dead-collected and heavily worn shell lacking the protoconch and upper teleoconch whorls, with a shell length of 35.3 mm, was illustrated. The shell morphology, including the shape and position of the subsutural anal sinus extending across the subsutural ramp, allows for confident placement in the genus Leucosyrinx . For differences from L. claviforma, see the Remarks section of that species.</p><p>Distribution</p><p>Western Australia, 376– 494 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFEF3D3993FAFD8230609EA7	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFEF3D3993C1FB0633159D81.text	03FCE539FFEF3D3993C1FB0633159D81.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx halicyria (Melvill 1904) Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx halicyria (Melvill, 1904) comb. nov.</p><p>Fig. 32F</p><p>Pleurotoma (Surcula) halicyria Melvill, 1904: 164–165, pl. 10 fig. 16.</p><p>Comitas halicyria – Powell 1969: 286 (23-298), pl. 220 fig. 4, with query.</p><p>Pleurotoma (Surcula) halicyria – Kantor et al. 2022: fig. 12b.</p><p>Type material</p><p>Holotype INDIAN OCEAN • 1 spec., SL 32.0 mm; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=56.933334&amp;materialsCitation.latitude=24.816668" title="Search Plazi for locations around (long 56.933334/lat 24.816668)">Gulf of Oman</a>; 24°49′ N, 56°56′ E, 225 ftm (= 411 m), NHMUK 1905-7-14 -49.</p><p>Remarks</p><p>The species is known only from the holotype. There are no sequenced species of Leucosyrinx that resemble L. halicyria . We attribute it to the genus with some doubts, but remove it from Comitas on the basis of the shape and position of the subsutural anal sinus, occupying the entire subsutural ramp, like in other Leucosyrinx spp.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFEF3D3993C1FB0633159D81	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD03D069057FECA30E39E16.text	03FCE539FFD03D069057FECA30E39E16.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx julia Thiele 1925	<div><p>Leucosyrinx julia Thiele, 1925</p><p>Fig. 32G</p><p>Leucosyrinx julia Thiele, 1925: 202 (236), pl. 24(36) fig. 24.</p><p>Leucosyrinx julia – Powell 1969: 338 (23-402), pl. 257 figs 4–5.</p><p>Type material</p><p>Syntypes</p><p>EAST AFRICA • 4 specs; off <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=41.783333&amp;materialsCitation.latitude=-1.6666667" title="Search Plazi for locations around (long 41.783333/lat -1.6666667)">Brawa</a>; 1°40′ S, 41°47′ E; depth 693 m; Valdivia, stn 251; ZMB Mol 109379 .</p><p>Remarks</p><p>The largest type specimen has a SL of 10.6 mm, appears to be adult, and was illustrated by Thiele (1925). Conchologically, it possesses all the characteristics of Leucosyrinx . The original illustration shows a strongly angular shell base, although it is somewhat more obtuse in the actual specimen. In shell outline and size, it resembles L. lozoueti sp. nov., which, however, has a different spiral sculpture with much finer, uniformly spaced cords. Powell (1969) attributed several specimens to this species with shell lengths up to 53 mm, collected by the John Murray expedition in the Gulf of Aden at a depth of 1040 m.</p><p>Distribution</p><p>East Africa to Gulf of Aden, 693–1040 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFD03D069057FECA30E39E16	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD03D06903AFBF430539DEE.text	03FCE539FFD03D06903AFBF430539DEE.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx kirai (Powell 1969) Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx kirai (Powell, 1969) comb. nov.</p><p>Fig. 26L</p><p>Comitas kirai Powell, 1969: 279 (23-291), pl. 223 figs 4–6.</p><p>Comitas kirai – Kira 1972: 101, pl. 36 fig. 7. — Hasegawa et al. 2000: 633, pl. 315 fig. 71. — Higo et al. 2001: pl. 102 fig. g3535 (holotype).</p><p>Type material</p><p>Holotype JAPAN • Kii; ANSP 232552.</p><p>Remarks</p><p>The species is very similar both in shell shape and particularly in spiral sculpture to L. breviplicata . It is unusually small for Comitas (attaining 40 mm) and in general shell characters matches those of species of Leucosyrinx, including the subsutural position of the anal sinus that occupies the entire subsutural ramp. We conditionally transfer it to Leucosyrinx, pending data on the radular morphology. Although by shell characters it can be synonymized with L. breviplicata, it inhabits much shallower depths (50–400 m – Hasegawa et al. 2000: 633). In the absence of sequenced material from Japan, we consider it a distinct species.</p><p>Tan &amp; Islami (2021: fig. 9c) illustrated a specimen from Indonesia as Comitas kirai . The identification of the specimen is not straightforward. The shell is much darker, as illustrated in other publications, and the spiral cords on the last whorl are very closely spaced. It may represent a separate species.</p><p>Distribution</p><p>Japan, 50–400 m,? Indonesia.</p></div>	https://treatment.plazi.org/id/03FCE539FFD03D06903AFBF430539DEE	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD13D0793DEFECA33DE9EEC.text	03FCE539FFD13D0793DEFECA33DE9EEC.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx melvilli (Schepman 1913) Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx melvilli (Schepman, 1913) comb. nov.</p><p>Fig. 17I–J</p><p>Surcula melvilli Schepman, 1913: 422, pl. 27 fig. 7.</p><p>Comitas melvilli – Powell 1969: 269 (23-281), pl. 217 figs 6–7. — Sysoev 1997: 347.</p><p>Type material</p><p>Syntypes</p><p>TIMOR SEA • 2 specs; 10°48.6′ S, 123°23.1′ E; depth 918 m; Siboga, stn 300; NATURALIS, ZMA. MOLL.174487, ZMA.MOLL.137982 (Fig. 17I–J) • 1 spec.; near Kei Is.; 5°53.8′ S, 132°48.8′ E; depth 560 m; Siboga, stn 262; NATURALIS, ZMA.MOLL.137981 .</p><p>Remarks</p><p>Schepman (1913) did not designate the holotype, and mentioned three specimens in the original description. Nevertheless, Schepman specified that “The specimen from stn 262 is a smaller, much worn shell, of somewhat doubtful character” (560 m, near Kei Is., 5°53.8′ S, 132°48.8′ E, Siboga stn 262). It should be considered that Schepman expressly excluded it from the type series (Art. 72.4.1 of ICZN). He provided the measurements for a single specimen (SL 62 mm), which was also illustrated on pl. 27 fig. 7. The same specimen is illustrated herein.</p><p>The shell shape, sculpture pattern, and the shape of the subsutural anal sinus fit well within the variability observed in the species of Leucosyrinx as defined here. This species exhibits similarities to Leucosyrinx jeedara from Australia, albeit with notable differences in size (up to 62 mm versus 31 mm), a lower last whorl, a taller spire, and a cream coloration. Given that the anal sinus shape aligns more closely with species of Leucosyrinx than with Comitas, we propose transferring the species to the former genus.</p><p>Distribution</p><p>Timor Sea, 918 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFD13D0793DEFECA33DE9EEC	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD13D07938BFAD330D99DE5.text	03FCE539FFD13D07938BFAD330D99DE5.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx pagodaeformis (Schepman 1913) Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx pagodaeformis (Schepman, 1913) comb. nov.</p><p>Fig. 32H</p><p>Drillia pagodaeformis Schepman, 1913: 45 (409), pl. 26 fig. 5a–b.</p><p>Comitas pagodaeformis – Powell 1969: 271 (23-283), pl. 219 figs 1–2. — Kosuge 1992: 167, pl. 59 figs 4–5.</p><p>Type material</p><p>Syntypes</p><p>INDONESIA • 1 spec.; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=129.48&amp;materialsCitation.latitude=-0.98499995" title="Search Plazi for locations around (long 129.48/lat -0.98499995)">Halmahera Sea</a>; 0°59.1′ S, 129°28.8′ E; depth 411 m; NATURALIS • 1 spec.; near Kei Is.; 5°26.6′ S, 132°32.5′ E; depth 397 m; NATURALIS .</p><p>Remarks</p><p>The figured syntype (Fig. 32H, SL 28.7 mm) demonstrates all conchological characteristics of Leucosyrinx, including a subsutural anal sinus occupying the entire subsutural ramp. Therefore, the species is transferred to Leucosyrinx . It is most similar to L. breviplicata, differing in the more broadly-spaced spiral cords on the shell periphery.</p><p>Distribution</p><p>Indonesia to NW Australia, 300– 411 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFD13D07938BFAD330D99DE5	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD23D0493D2FECA331599C8.text	03FCE539FFD23D0493D2FECA331599C8.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx palawanica (Powell 1969) Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx palawanica (Powell, 1969) comb. nov.</p><p>Fig. 33A</p><p>Comitas aequatorialis palawanica Powell, 1969: 282 (23-294), pl. 225 figs 5–6.</p><p>Type material</p><p>Holotype</p><p>PHILIPPINES • Palawan <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=118.48333&amp;materialsCitation.latitude=10.777778" title="Search Plazi for locations around (long 118.48333/lat 10.777778)">Passage</a>; 10°46′40″ N, 118°29′ E; depth 515 ftm (= 941 m); Albatross, stn 5350; USNM 237910.</p><p>Remarks</p><p>The species is known from a single holotype with SL of 43.5 mm. The shell sculpture pattern and the shape of the subsutural anal sinus fit well within the variability observed in species of Leucosyrinx as defined here. Therefore, we transfer the species to Leucosyrinx . Originally, it was described as a subspecies of L. aequatorialis Thiele, 1925, but differs markedly in size (43.5 mm vs 13 mm). Additionally, in L. aequatorialis, the last whorl lacks axial ribs and a shoulder carina, while the carina is well-developed in L. palawanica . Therefore, we consider it a separate species.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFD23D0493D2FECA331599C8	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD23D0293C2FC36313F9B57.text	03FCE539FFD23D0293C2FC36313F9B57.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx paupera (Watson 1881) Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx paupera (Watson, 1881) comb. nov.</p><p>Fig. 33B–D</p><p>Pleurotoma (Drillia) paupera Watson, 1881: 411 .</p><p>Pleurotoma (Typhlomangelia) paupera – Watson 1886: 317, pl. 25 fig. 3.</p><p>Turricula paupera – Powell 1969: 244 (23-238), pl. 202.</p><p>Comitas paupera – Sysoev 1996 (part.): 8, figs 42, 45, 48 (non figs 43 = Borsoniidae gen. sp., 44, 46–47 = Leucosyrinx arcana).</p><p>Type material</p><p>Lectotype INDONESIA • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=134.075&amp;materialsCitation.latitude=-5.6833334" title="Search Plazi for locations around (long 134.075/lat -5.6833334)">Arafura Sea</a>, Aru I., 5°41′ S, 134°04′30″ E; depth 800 ftm (= 1463 m); HMS Challenger, stn 191; NHMUK 1887.2.9.1009.</p><p>Paralectotypes</p><p>INDONESIA • 2 specs; same data as for lectotype: NHMUK 1887.2.9.1010, 1887.2.9.1011 .</p><p>Remarks</p><p>As evident from the synonymy, determining the generic position of this species is not straightforward. The type series likely comprises three species. The lectotype (Fig. 32B) was probably first designated by Powell (1969: 244) in the table of measurements. Although the specimen with the SL of 40.1 mm is significantly damaged, we tentatively attribute it to Leucosyrinx based on the general shell shape, sculpture, and position of the anal sinus. The paralectotype NHMUK 1887.2.9.1010 (Fig. 33C, SL 33.3 mm) differs from the lectotype by having much less pronounced axial sculpture, the presence of dendritic spiral threads, and a lower position of the shallow anal sinus, which extends below the limits of the subsutural ramp. Additionally, it shows traces of an obtuse columellar fold, and the inside of the aperture is orange. In our opinion, this specimen may belong to the family Borsoniidae . Finally, the paralectotype NHMUK 1887.2.9.1011 (Fig. 33D, SL 18.5 mm) may be a juvenile specimen of Leucosyrinx arcana .</p><p>Distribution</p><p>Indonesia, Gulf of Aden, and Gulf of Oman, 1463 – 2000 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFD23D0293C2FC36313F9B57	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD43D029026FEB4331599E9.text	03FCE539FFD43D029026FEB4331599E9.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx powelli (Rehder & Ladd 1973)	<div><p>Leucosyrinx powelli (Rehder &amp; Ladd, 1973)</p><p>Fig. 33G</p><p>Comitas powelli Rehder &amp; Ladd, 1973: 45, pl. 3 figs 11–12.</p><p>Type material</p><p>Holotype PACIFIC OCEAN • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=178.23666&amp;materialsCitation.latitude=17.975" title="Search Plazi for locations around (long 178.23666/lat 17.975)">Agassiz Guyot</a>; 17°58.5′ N, 178°14.2′ E; depth 865–884 ftm (= 1581 – 1617 m); USNM 703267.</p><p>Remarks</p><p>The holotype is the only known specimen, with SL 13.0 mm. Although the outer lip of the aperture is broken, judging from the growth lines, the shape of the anal sinus corresponds to that of other species of Leucosyrinx as defined here. The species is very similar if different from Leucosyrinx herilda (Dall, 1908) (see Remarks to L. herilda).</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFD43D029026FEB4331599E9	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD43D029067FBD533159C03.text	03FCE539FFD43D029067FBD533159C03.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx turrita Sysoev 1990	<div><p>Leucosyrinx turrita Sysoev, 1990</p><p>Leucosyrinx turritus Sysoev, 1990: 247, pl. 2 figs 3–4.</p><p>Type material</p><p>Holotype PACIFIC OCEAN • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-100.666664&amp;materialsCitation.latitude=-25.996666" title="Search Plazi for locations around (long -100.666664/lat -25.996666)">Sala-y-Gomes Ridge</a>; 25°59.8′ S, 100°40′ W; depth 330–350 m; ZMMU Lc-5733.</p><p>Remarks</p><p>The species was described based on four empty shells, the largest (holotype) with SL 30.0 mm. In general shell characters, including the position of the anal sinus, the species is referable to Leucosyrinx .</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFD43D029067FBD533159C03	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD43D039003F9EE331598D0.text	03FCE539FFD43D039003F9EE331598D0.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx suratensis (Thiele 1925)	<div><p>Leucosyrinx suratensis (Thiele, 1925)</p><p>Fig. 33H</p><p>Surcula suratensis Thiele, 1925: 180 (214), pl. 23(35) fig. 19.</p><p>Surcula coreanica (Adams &amp; Reeve, 1848) (not of Adams &amp; Reeve 1850) – von Martens 1904: 80, pl. 2 fig. 3.</p><p>? Leucosyrinx suratensis – Powell 1969: 340 (23-404), pl. 259 figs 1–2.</p><p>Type material</p><p>Holotype INDONESIA • off north Sumatra; 5°23′ N, 94°48′ E; depth 1024 m; ZMB Moll 60072.</p><p>Remarks</p><p>The holotype measures 16.6 mm in shell length and exhibits significant shell breakage followed by subsequent repair, resulting in an exaggeratedly deep anal sinus. Von Martens (1904) illustrated only the lateral view of the shell. The remaining intact whorls demonstrate the characteristic shape of the anal sinus typical of Leucosyrinx, and, overall, the shell morphology aligns with the variability seen within the genus.</p><p>Leucosyrinx suratensis resembles several species of Leucosyrinx, particularly L. floraecharlottae sp. nov. and L. ringevali sp. nov. However, it differs in having more pronounced spiral cords on the subsutural ramp and a stouter shell with a more rapidly constricting shell base.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFD43D039003F9EE331598D0	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD53D0393D9FD3E33159FE6.text	03FCE539FFD53D0393D9FD3E33159FE6.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx undosa (Schepman 1913) Kantor & Fedosov & Puillandre 2025	<div><p>Leucosyrinx undosa (Schepman, 1913) comb. nov.</p><p>Fig. 33E</p><p>Surcula undosa Schepman, 1913: 61 (425), pl. 27 fig. 13a–b.</p><p>Comitas undosa – Powell 1969: 282 (23-294), pl. 227 figs 3–4.</p><p>Paracomitas undosa – Shuto 1970a: 170, pl. 11 figs 8–9.</p><p>Type material</p><p>Holotype INDONESIA • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=118.253334&amp;materialsCitation.latitude=-7.4" title="Search Plazi for locations around (long 118.253334/lat -7.4)">Flores Sea</a>; 7°24′ S, 118°15.2′ E; depth 794 m; NATURALIS, ZMA.MOLL.136841.</p><p>Remarks</p><p>In general shell characters, including the position of the anal sinus, the species is referable to Leucosyrinx . Shuto (1970a) transferred it to Paracomitas Powell, 1942 . In our opinion this is unjustified. The genus Paracomitas is characterized and differentiated from Leucosyrinx and Comitas by a protoconch of 2.5 sharply carinated whorls. The protoconch is missing in the holotype of S. undosa, the only known specimen of the species. Therefore, pending additional data, we consider it a species of Leucosyrinx .</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFD53D0393D9FD3E33159FE6	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD53D009075F906331598E7.text	03FCE539FFD53D009075F906331598E7.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx caecilia Thiele 1925	<div><p>“ Leucosyrinx ” caecilia Thiele, 1925</p><p>Fig. 34A</p><p>Leucosyrinx caecilia Thiele, 1925: 202 (236), pl. 24 (36) fig. 23.</p><p>Leucosyrinx caecilia – Powell 1969: 337 (23-401), pl. 257 fig. 2.</p><p>Type material</p><p>Holotype TANZANIA • Dar-es-Salaam: 6°34′ S, 39°35′ E; depth 404 m; ZMB Mol 109385.</p><p>Remarks</p><p>The single known specimen is the juvenile holotype, with SL of 7.5 mm. The anal sinus is typical of Leucosyrinx, but the shoulder is accentuated by two distinct and broad spiral cords that appear wavy on poorly pronounced axial folds. This type of sculpture is not found in other species of the genus, but it is unclear whether these features are characteristics of the juvenile shell or of the species as a whole. We tentatively retain the species within Leucosyrinx, though with some reservations.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFD53D009075F906331598E7	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD63D009012FCCB33159F84.text	03FCE539FFD63D009012FCCB33159F84.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx canyonensis (Dell 1956)	<div><p>“ Leucosyrinx ” canyonensis (Dell, 1956)</p><p>Fig. 34B</p><p>Antimelatoma canyonensis Dell, 1956: 142, fig. 196.</p><p>Leucosyrinx canyonensis – Powell 1979: 230, fig. 53: 3. — Spencer et al. 2011.</p><p>Type material</p><p>Holotype NEW ZEALAND • South I., off east Otago; depth 260–350 ftm (= 475–640 m); MNZ, M.009262.</p><p>Remarks</p><p>The species is characterized by a small shell (SL 9.3 mm in the holotype) with strong spiral cords and a distinct crenulated shoulder carina. It is rather different from known species of Leucosyrinx, but in the absence of any data on anatomy, we retain it in Leucosyrinx with strong doubts.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFD63D009012FCCB33159F84	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD63D0E9066FA6A33159B57.text	03FCE539FFD63D0E9066FA6A33159B57.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx erna Thiele 1925	<div><p>“ Leucosyrinx ” erna Thiele, 1925</p><p>Fig. 34C</p><p>Leucosyrinx erna Thiele, 1925: 201 (235), pl. 24 (36) fig. 22.</p><p>Leucosyrinx erna – Powell 1969: 337 (23-401), pl. 257 fig. 1.</p><p>Type material</p><p>Syntypes</p><p>TANZANIA • 3 specs; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=39.316666&amp;materialsCitation.latitude=-5.45" title="Search Plazi for locations around (long 39.316666/lat -5.45)">Zanzibar Channel</a>; 5°27′ S, 39°19′ E; depth 463 m; ZMB Mol 109384 .</p><p>Remarks</p><p>The species is known from three dead-collected and immature shells (maximal SL 7.8 mm). It is characterized by strong and very closely spaced spiral cords below shoulder that was not found in other species of Leucosyrinx, although somewhat similar but broader cords are also found in L. nodulocordata sp. nov. In the absence of any data on anatomy, we retain it in Leucosyrinx with strong doubts.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFD63D0E9066FA6A33159B57	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD83D0E901CFEBB30D99D33.text	03FCE539FFD83D0E901CFEBB30D99D33.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx sansibarica Thiele 1925	<div><p>“ Leucosyrinx ” sansibarica Thiele, 1925</p><p>Fig. 34D–F</p><p>Leucosyrinx sansibarica Thiele, 1925: 181 (215), pl. 24 (36) fig. 1.</p><p>Brachytoma griffithii (not Gray, 1833) – von Martens 1904: 84. — Thiele 1904: 173, pl. 9 fig. 73.</p><p>Leucosyrinx sansibarica – Powell 1969: 340 (23-404), pl. 258 fig. 5.</p><p>Type material</p><p>Syntypes</p><p>EAST AFRICA • 2 specs; Pembakanal; 5°24′ S, 39°19′ E; depth 818 m; Valdivia, stn 246 (2 dead); ZMB ?.</p><p>GULF OF ADEN • 2 specs; 13°2′ N, 46°41′ E; depth 1469 m; Valdivia, stn 271; ZMB Mol 60089, ZMB Mol 109387 .</p><p>Remarks</p><p>The species was established for Brachytoma griffithii sensu von Martens (1904), not Gray, 1833. Von Martens (1904) cited material from two Valdivia stations: station 246 (Pemba Channel, off Zanzibar) and station 271 in the Gulf of Aden. Two dead specimens were collected at the first station, while several live specimens were collected at station 271. Thiele (1904: 173, pl. 9 fig. 73) illustrated the radula of the species without indicating the exact specimen, describing a radula typical of Comispira with a large central formation. Von Martens (1904) proposed a variety, gracilior, for specimens from off Zanzibar. When Thiele (1925) renamed the species Leucosyrinx sansibarica, he did not designate a holotype or a type series, nor did he provide a formal description, but from the specific epithet, it can be inferred he referred to the specimens from station 246. His illustration aligns with var. gracilior as described by von Martens, 1904 (“Martens distinguished a var. gracilior, which I have illustrated in Figure 1.”—my translation).</p><p>We were unable to examine the specimens from the station 246, but the specimens from the station 271 in the Gulf of Aden are not conspecific. While one specimen represents the typical Leucosyrinx (ZMB Mol 60089, Fig. 34E), the other, with a row of subsutural knobs, belongs to Comispira (ZMB Mol 109387, Fig. 34F), rather similar to C. obtusigemmata (see below). The specimen illustrated by Thiele (1925) (Fig. 34D) is generally similar to the specimen of Leucosyrinx from the Gulf of Aden (Fig. 34E), differing mainly in its slenderer shell (a variable intraspecific character in Leucosyrinx) and a much shallower anal sinus. It should be noted that in several of Thiele’s (1925) line drawings, the illustrated anal sinus does not match the actual sinus in the same specimen. We therefore consider L. sansibarica as belonging to the genus, although a final decision requires examining the illustrated specimen (currently unavailable) and designating a lectotype.</p><p>Distribution</p><p>Tanzania to Gulf of Aden, 818–1469 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFD83D0E901CFEBB30D99D33	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD93D0F9030FE7033159F69.text	03FCE539FFD93D0F9030FE7033159F69.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Rhodopetoma amycus (Dall 1919) Kantor & Fedosov & Puillandre 2025	<div><p>Rhodopetoma amycus (Dall, 1919) comb. nov.</p><p>Fig. 34G</p><p>Antiplanes amycus Dall, 1919: 36, pl. 11 fig. 5.</p><p>Leucosyrinx kantori McLean, 1995: 81 (replacement name for Antiplanes amycus Dall, 1919), invalid.</p><p>Type material</p><p>Holotype UNITED STATES OF AMERICA • SL 21.5 mm; California, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-122.2&amp;materialsCitation.latitude=36.7167" title="Search Plazi for locations around (long -122.2/lat 36.7167)">West of Monterey Bay</a>; 36.7167° N, 122.2° W; depth 1063 m; USS Albatross, stn 3670; USNM 226163.</p><p>Remarks</p><p>Dall (1919) described two species with the epithet amycus – Antiplanes amycus (p. 36, pl. 11 fig. 5) and Leucosyrinx amycus (p. 5, pl. 3 fig. 7). McLean (1995) transferred Antiplanes amycus to Leucosyrinx and proposed a replacement name, Leucosyrinx kantori, to avoid secondary homonymy. Examination of the type specimen of Antiplanes amycus (USNM 226163) revealed that the anal sinus is situated in the lower part of the subsutural ramp and also occupies part of the shoulder, a feature not found in any species of Leucosyrinx . Therefore, this species should be excluded from Leucosyrinx, and according to Article 59.4 of the ICZN, the name Antiplanes amycus Dall, 1919 should be reinstated as valid. Based on conchological characters, we transfer the species to the genus Rhodopetoma Bartsch, 1944 (family Pseudomelatomidae). Rhodopetoma is very similar to Antiplanes, differing mainly in the presence of variously developed axial folds. The name Leucosyrinx kantori thus becomes invalid. Leucosyrinx amycus Dall, 1919 is considered a junior subjective synonym of Aforia goodei (Dall, 1890) (McLean 1971b) .</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFD93D0F9030FE7033159F69	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFD93D0C9034FA5433159860.text	03FCE539FFD93D0C9034FA5433159860.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Spergo chuni (von Martens 1901)	<div><p>Spergo? chuni (von Martens, 1901) comb. nov.</p><p>Fig. 35A</p><p>Pleurotoma (Pseudomata [sic]) chuni von Martens, 1901: 19 .</p><p>Comitas chuni – Powell 1969: 274 (23-286), pl. 221 fig. 1.</p><p>Type material</p><p>Holotype INDONESIA • west coast of Sumatra; 1°48′ N, 96°53′ E; depth 1143 m; ZMB Moll 60091.</p><p>Remarks</p><p>This large species (with SL 98.9 mm in the holotype), along with Spergo sibogae Schepman, 1913, was attributed to Comitas by Powell (1969) without much discussion. He simply mentioned that “Both species fit reasonably well into the genus Comitas ” (p. 274 (23-286)). At the same time, Powell noted that “The figure of this species, which was referred to Pontiothauma by von Martens (1904), suggests, by the growth lines, a rather deep turriculid-style sinus, quite foreign to that of Pontiothauma, which has at most a very weak sutural sinus.” The type of Pleurotoma chuni is rather similar to Spergo Dall, 1895, particularly to Spergo sibogae, although its anal sinus is slightly deeper than in the mentioned species (Crisсione et al. 2021: fig. 11f). Nevertheless, the shape of the sinus is quite different from those of Leucosyrinx and Comitas . The position of S. sibogae within Spergo was confirmed by a multilocus molecular analysis (Crisсione et al. 2021). Based on the similarity between the shells of Pleurotoma chuni and Spergo sibogae, we reallocate the former species to Spergo ( Raphitomidae) with some reservations.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFD93D0C9034FA5433159860	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFDA3D0C9050FD4E33159F92.text	03FCE539FFDA3D0C9050FD4E33159F92.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Burchia clionella (Dall 1908)	<div><p>Burchia clionella (Dall, 1908)</p><p>Fig. 34H</p><p>Leucosyrinx? clionella Dall, 1908: 270, pl. 14 fig. 3.</p><p>Crassispira (Burchia) clionella – Powell 1966: 78.</p><p>“ Leucosyrinx ” clionella – McLean 1971a: 120, fig. 36.</p><p>Type material</p><p>Syntypes?</p><p>PACIFIC OCEAN • 1 spec.; Gulf of Panama; depth 511 ftm (= 934 m); USNM 97069 • 1 spec.; Ecuador, off Manta; depth 401 ftm (= 733 m); USNM 123125 .</p><p>Remarks</p><p>The shell differs significantly from any species of Leucosyrinx due to its very short siphonal canal and the anal sinus being situated in the lower part of the subsutural ramp. McLean (1971a) illustrated the species’ radula, but due to the small size of the photograph, little can be discerned, except that it consists solely of duplex marginal teeth. Powell (1966) attributed the species to Burchia Bartsch, 1944 ( Pseudomelatomidae), and we concur with this classification.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFDA3D0C9050FD4E33159F92	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFDA3D0A9377FA7F33159BFA.text	03FCE539FFDA3D0A9377FA7F33159BFA.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Lora equatorialis Dall 1919	<div><p>Lora equatorialis Dall, 1919</p><p>( Pseudomelatomidae, genus assignment uncertain)</p><p>Fig. 35B</p><p>Lora equatorialis Dall, 1919: 44, pl. 13 fig. 2.</p><p>? Leucosyrinx equatorialis – McLean 1971a: 120, fig. 38.</p><p>Type material</p><p>Syntypes</p><p>PACIFIC OCEAN • 3 specs; coast of Ecuador to Patagonia; depth 122–407 ftm; USNM 97092, 97070, 697384 .</p><p>Remarks</p><p>The small shell (13.5 mm in shell length, according to the original description) is characterized by a very short siphonal canal, strong axial ribs extending from the subsutural ramp to the siphonal canal, and an extremely shallow, barely discernible anal sinus. These features exclude the species from Leucosyrinx . McLean (1971a: fig. 38) illustrated the radula of a specimen from the type series (USNM 97070), but due to the small size of the photograph, little can be discerned beyond the presence of duplex marginal teeth. This suggests that the species likely belongs to the family Pseudomelatomidae, though we are currently unable to determine its exact generic position.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFDA3D0A9377FA7F33159BFA	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFDC3D0A93CFFDE033159E79.text	03FCE539FFDC3D0A93CFFDE033159E79.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Antimelatoma eremita (Murdoch & Suter 1906)	<div><p>Antimelatoma eremita (Murdoch &amp; Suter, 1906)</p><p>Fig. 35C</p><p>Pleurotoma (Leucosyrinx) eremita Murdoch &amp; Suter, 1906: 287, pl. 22 figs 18–19.</p><p>Type material</p><p>Holotype NEW ZEALAND • off Great Barrier I., North I.; depth 110 ftm (= 201 m); MNZ, M.001718.</p><p>Remarks</p><p>In its shell characters this small species (SL of the holotype 5.8 mm) is very different from Leucosyrinx, but fits well the morphology of the genus Antimelatoma Powell, 1942 (family Psudomelatomidae). It is identified as Antimelatoma in the collections of Museum of New Zealand Te Papa Tongarewa and we follow here this generic assignment.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFDC3D0A93CFFDE033159E79	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFDC3D0A9341FB6430519DA8.text	03FCE539FFDC3D0A9341FB6430519DA8.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Leucosyrinx elsa Thiele 1925	<div><p>Leucosyrinx elsa Thiele, 1925 (family and genus assignment uncertain)</p><p>Fig. 35D</p><p>Leucosyrinx elsa Thiele, 1925: 201 (235), pl. 24(36) fig. 21.</p><p>Leucosyrinx elsa – Powell 1969: 337 (23-401), pl. 257 fig. 3.</p><p>Type material</p><p>Syntypes</p><p>TANZANIA • 1 spec.; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=39.3&amp;materialsCitation.latitude=-5.45" title="Search Plazi for locations around (long 39.3/lat -5.45)">Zanzibar Channel</a>; 5°27′ S, 39°18′ E; depth 463 m; Valdivia, stn 245; ZMB Mol 109383 • 25 specs; Dar Es Salaam; Valdivia, stn 242; ZMB Mol 109383 .</p><p>Remarks</p><p>The species is known only from numerous empty juvenile shells (SL up to 5.8 mm) from two stations off Tanzania. The spiral sculpture on the last whorl is dominated by several strong cords below the shoulder crossing axial folds extending in some specimens to the shell base and thus isolating two or sometimes three rows of strong nodules (more pronounced than in the figured herein syntype). This type of sculpture is not found in any species of Leucosyrinx, and we exclude the species from the genus. Current taxonomic position is unknown.</p><p>Distribution</p><p>East Africa, Tanzania, 463 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFDC3D0A9341FB6430519DA8	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFDD3D0B9028FECA30A799C3.text	03FCE539FFDD3D0B9028FECA30A799C3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Comispira erica (Thiele 1925)	<div><p>Comispira erica (Thiele, 1925) comb. nov.</p><p>Fig. 35E</p><p>Leucosyrinx erica Thiele, 1925: 236, pl. 36 (24) fig. 25.</p><p>Comitas erica – Powell 1969: 284 (23-296), pl. 226 fig. 2. — Sysoev 1996: 8, fig. 41.</p><p>Type material</p><p>Syntypes</p><p>SUMATRA • 3 specs; off Siberut I., 0°39′ S, 98°52′ E; depth 750 m; ZMB Mol 109382 .</p><p>Remarks</p><p>The type series consists of 3 shells, one complete (SL 20.1 mm), one juvenile and one broken.</p><p>The species is characterized by a subsutural row of rounded knobs. This is not found in any species of Leucosyrinx, but on the contrary present in all species of Sibogasyrinx and Comispira . Based on the spiral sculpture pattern we conditionally attribute the species to Comispira .</p><p>Distribution</p><p>Zanzibar, Maldive Is. and Sumatra, 750– 797 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFDD3D0B9028FECA30A799C3	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFDD3D0B935FFC2833159CAD.text	03FCE539FFDD3D0B935FFC2833159CAD.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Pleurotomella esilda Dall 1908	<div><p>Pleurotomella esilda Dall, 1908 (family and genus assignment uncertain)</p><p>Fig. 35F</p><p>Pleurotomella (Pleurotomella) esilda Dall, 1908: 282 .</p><p>Leucosyrinx esilda – McLean 1971b: sp. 1668, with query.</p><p>Type material</p><p>Holotype PACIFIC OCEAN • Gulf of Panama; depth 730 ftm (= 1335 m); USNM 123126.</p><p>Remarks</p><p>The species is based on a single, heavily broken, dead-collected shell (22.8 mm in shell length). It differs significantly from species of Leucosyrinx as defined here, exhibiting a very short siphonal canal, strong and long axial ribs extending to the poorly defined subsutural ramp, and an anal sinus situated close to the shoulder. On these grounds, we exclude the species from Leucosyrinx, but we are currently unable to determine its generic position.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFDD3D0B935FFC2833159CAD	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFDD3D0893D5F910331598E7.text	03FCE539FFDD3D0893D5F910331598E7.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Comispira exstructa (von Martens 1904) Kantor & Fedosov & Puillandre 2025	<div><p>Comispira exstructa (von Martens, 1904) comb. nov.</p><p>Fig. 35G</p><p>Surcula exstructa von Martens, 1904: 81, pl. 1 fig. 4.</p><p>Surcula exstructa – Thiele 1925: 181 (215), pl. 23(35) fig. 21.</p><p>Comitas exstructa – Powell 1969: 283 (23-295), pl. 226 fig. 1</p><p>Type material</p><p>Holotype <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=93.11667&amp;materialsCitation.latitude=7.8" title="Search Plazi for locations around (long 93.11667/lat 7.8)">INDIAN OCEAN</a> • Nicobar Is.; 7°48′ N, 93°07′ E; depth 805 m; whereabouts unknown .</p><p>Remarks</p><p>This species is based on a single strongly damaged holotype (SL 24 mm). The original drawing and the details of the sculpture provided by Thiele (1925) show a subsutural row of rounded knobs. These are not found in any species of Leucosyrinx, but are, conversely, present in all species of Sibogasyrinx and Comispira . Based on the broadly-spaced and rather strong spiral cords, we attribute the species to Comispira .</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFDD3D0893D5F910331598E7	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFDE3D0893C5FCCB301E9C1D.text	03FCE539FFDE3D0893C5FCCB301E9C1D.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Sibogasyrinx lancea (Y. - C. Lee 2001) Kantor & Fedosov & Puillandre 2025	<div><p>Sibogasyrinx lancea (Y.-C. Lee, 2001) comb. nov.</p><p>Fig. 35H–I</p><p>Leucosyrinx lancea Y.-C. Lee, 2001: 8, fig. 2a–d.</p><p>Type material</p><p>Holotype TAIWAN • off Pratas I.; depth 430–610 m; dredged by shrimp trawlers; NMNS-3704001.</p><p>Material examined (sequenced)</p><p>PHILIPPINES • 1 lv; Luzon I.; 15°53′ N, 121°54′ E; depth 518–538 m; AURORA 2007, stn CP2750; MNHN-IM-2009-13465 .</p><p>Remarks</p><p>The species is characterized by a subsutural row of rounded knobs. This is not found in any species of Leucosyrinx, but is, conversely, present in all species of Sibogasyrinx and Comispira . Moreover, a very similar specimen (MNHN-IM-2009-13465 – Fig. 35E), collected off Luzon, Philippines, at similar depths (518–538 m) was recently sequenced and a partial cox 1 sequence confidently places it in Sibogasyrinx . Therefore, we transfer it to Sibogasyrinx .</p><p>Distribution</p><p>Taiwan to Philippines, 430– 518 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFDE3D0893C5FCCB301E9C1D	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFDE3D0993FDF982339099A6.text	03FCE539FFDE3D0993FDF982339099A6.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Comispira obtusigemmata (Schepman 1913) Kantor & Fedosov & Puillandre 2025	<div><p>Comispira obtusigemmata (Schepman, 1913) comb. nov.</p><p>Fig. 36A</p><p>Surcula obtusigemmata Schepman, 1913: 60 (424), pl. 27 fig. 12a–b.</p><p>Comitas obtusigemmata – Powell 1969: 284 (23-296), pl. 227 figs 1–2. — Sysoev 1997: 347.</p><p>Type material</p><p>Syntypes</p><p>INDONESIA • 1 spec.; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=118.28167&amp;materialsCitation.latitude=-4.3683333" title="Search Plazi for locations around (long 118.28167/lat -4.3683333)">Makassar Strait</a>; 4°22.1′ S, 118°16.9′ E; depth 2029 m; Siboga Expedition stn 76; NATURALIS, ZMA.MOLL.137985 • 1 spec.; channel between <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=127.48333&amp;materialsCitation.latitude=0.39666665" title="Search Plazi for locations around (long 127.48333/lat 0.39666665)">Makjan</a> and <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=127.48333&amp;materialsCitation.latitude=0.39666665" title="Search Plazi for locations around (long 127.48333/lat 0.39666665)">Halmahera</a>; 0°23.8′ N, 127°29′ E; depth 472 m; Siboga Expedition stn 137; NATURALIS, ZMA.MOLL.137983 • 1 spec.; Arafura Sea; 5°46.7′ S, 139°00′ E; depth 1788 m; Siboga Expedition stn 271; NATURALIS, ZMA. MOLL.137984 .</p><p>Remarks</p><p>The species is characterized by a subsutural row of rounded knobs. This is not found in any species of Leucosyrinx or Comitas, but on the contrary present in all species of Sibogasyrinx and Comispira . In shell shape and sculpture the species is quite similar to Comispira mai (Li &amp; Li, 2008) (Kantor et al. 2018: fig. 2a–c), differing in a slightly shorter shell and larger knobs on the shell periphery. Therefore, we transfer Surcula obtusigemmata to Comispira .</p><p>Conchologically, the species is very similar to Comispira subsuturalis (von Martens, 1901) and both species can be conspecific. Presently, we recognize both species as valid due to significant distance between collecting sites – East Africa for C. subsuturalis and Indonesia for C. obtusigemmata .</p><p>Schepman (1913) cited erroneously the longitude of stn 76 as 180°16.9′ E. The coordinates provided here corresponding to the Macassar Strait were taken from Tydeman (1902).</p><p>Distribution</p><p>Indonesia, 472–1788 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFDE3D0993FDF982339099A6	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFDF3D09906FFC0533159C1B.text	03FCE539FFDF3D09906FFC0533159C1B.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mangelia opulenta Thiele 1925	<div><p>Mangelia opulenta Thiele, 1925</p><p>Mangelia opulenta Thiele, 1925: 306 (340), pl. 28(40) fig. 4.</p><p>Comitas opulenta – Bozzetti 1993: 1.</p><p>Type locality</p><p>Padang, Sumatra.</p><p>Remarks</p><p>The species described and illustrated by Thiele (1925) definitely belongs to Mangeliidae P. Fischer, 1883 . Bozzetti (1993) without any discussion and undoubtedly erroneously attributed the species to Comitas . Therefore, we reinstate herein the original binomen of the species, although the generic position of the species requires clarification</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFDF3D09906FFC0533159C1B	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFDF3D17902FF98733159892.text	03FCE539FFDF3D17902FF98733159892.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Sibogasyrinx pikei (Dell 1963) Kantor & Fedosov & Puillandre 2025	<div><p>Sibogasyrinx pikei (Dell, 1963) comb. nov.</p><p>Fig. 36B</p><p>Waitara pikei Dell, 1963: 215, textfigs 3–4.</p><p>Leucosyrinx pikei – Powell 1969: 339 (23-403), pl. 258 figs 3–4; 1979: 230, pl. 47 fig. 8.</p><p>Type material</p><p>Holotype NEW ZEALAND • 18 miles N, 30° E of Poor Knights Is.; depth 256–267 fathoms (= 468–488 m); 20 Nov. 1962; MNZ, M.016273.</p><p>Remarks</p><p>The species was originally described based on two specimens, and no new specimens have been reported in the literature since its original description. In 1969, Powell transferred the species to the genus Leucosyrinx . However, the shell is characterized by the presence of a subsutural row of weak but distinct nodules – a feature never found in Leucosyrinx, but present in Sibogasyrinx and Comispira . In its slender shell with relatively weak uniform spiral sculpture the species is more similar to Sibogasyrinx . Therefore, we currently attribute the species, with some reservation, to Sibogasyrinx; this needs confirmation through examination of the radula or molecular data.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFDF3D17902FF98733159892	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFC13D1793D0FD78301E9C67.text	03FCE539FFC13D1793D0FD78301E9C67.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Comispira saudesae (Cossigniani 2018) Kantor & Fedosov & Puillandre 2025	<div><p>Comispira saudesae (Cossigniani, 2018) comb. nov.</p><p>Fig. 36C–D</p><p>Comitas saudesae Cossigniani, 2018: 30 .</p><p>Type material</p><p>Holotype TAIWAN • Nord-East Taiwan; depth 300–500 m; MMM.</p><p>Material examined (sequenced)</p><p>PHILIPPINES • 2 lv; Luzon I.; 15°20′ N, 121°37′ E; depth 593–600 m; AURORA 2007, stn CP2729; MNHN-IM-2009-18997, MNHN-IM-2009-18998 .</p><p>Material examined (not sequenced)</p><p>PHILIPPINES • 1 lv; off Panglao I., 9°36′ N, 123°42′ E; depth 609–673 m; PANGLAO 2005, stn CP2396; MNHN-IM-2009-13387</p><p>Remarks</p><p>The species is characterized by a subsutural row of rounded knobs, which are more prominent in the paratypes. This feature is not found in any species of Leucosyrinx or Comitas, but is consistently present in all species of Sibogasyrinx and Comispira . Our specimens closely resemble the type series, particularly the paratypes. Although unpublished, molecular data place the species within Comispira . Our findings extend the known range of the species from Taiwan to the Philippines.</p><p>Distribution</p><p>Philippines to Taiwan, 300– 600 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFC13D1793D0FD78301E9C67	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFC13D1493F8F94B31339921.text	03FCE539FFC13D1493F8F94B31339921.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Comispira subsuturalis (von Martens 1901) Kantor & Fedosov & Puillandre 2025	<div><p>Comispira subsuturalis (von Martens, 1901) comb. nov.</p><p>Fig. 36E–F</p><p>Pleurotoma (Brachytoma) subsuturalis von Martens, 1901: 16 .</p><p>Brachytoma subsuturalis – von Martens 1904: 85, pl. 1 fig. 7.</p><p>Comitas subsuturalis – Powell 1969: 285 (23-297), pl. 226 figs 3–4. — Sysoev 1996: 7, figs 31–40. — Hasegawa 2005: 169, fig. 11e-f.</p><p>Type material</p><p>Syntypes</p><p>INDIAN OCEAN • 2 specs; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=45.483334&amp;materialsCitation.latitude=1.8166666" title="Search Plazi for locations around (long 45.483334/lat 1.8166666)">East Africa</a>; 1°49′ N, 45°29′ E; depth 1134 m; ZMB Mol 60088 .</p><p>Remarks</p><p>Powell (1966: fig. 52) illustrated the radula of a specimen from the John Murray expedition, which features a large central formation typical of Cochlespiridae, but absent in Comitas and Leucosyrinx . The shell of this species has a row of subsutural nodules, a feature not found in any species of Leucosyrinx or Comitas, but present in all species of Sibogasyrinx and Comispira . The shell shape and sculpture closely resemble those of Comispira, leading us to transfer the species to that genus.</p><p>Distribution</p><p>This species is very broadly distributed, ranging from East Africa through the Indian Ocean to Japan, at depths of 494–1789 meters. This exceptionally wide distribution and high variability (Sysoev 1996) may indicate that we are dealing with a complex of species.</p></div>	https://treatment.plazi.org/id/03FCE539FFC13D1493F8F94B31339921	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFC23D1493C5FC8D33159F81.text	03FCE539FFC23D1493C5FC8D33159F81.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Sibogasyrinx suluensis (Powell 1969) Kantor & Fedosov & Puillandre 2025	<div><p>Sibogasyrinx suluensis (Powell, 1969) comb. nov.</p><p>Fig. 36G</p><p>Comitas suluensis Powell, 1969: 280 (23-292), pl. 223 fig. 7</p><p>Type material</p><p>Holotype Philippines • Sulu Archipelago, off Cagayan I.; depth 508 ftm (= 929 m); USNM 238399.</p><p>Remarks</p><p>The shell of this species has a row of subsutural nodules, a feature not found in any species of Leucosyrinx or Comitas, but present in all species of Sibogasyrinx and Comispira . In shell outline the species is more similar to Sibogasyrinx spp. than to any Comispira, therefore we allocate it to Sibogasyrinx .</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFC23D1493C5FC8D33159F81	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFC23D15931BFA6D30289BB1.text	03FCE539FFC23D15931BFA6D30289BB1.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Turris saldanhae Barnard 1958	<div><p>Turris saldanhae Barnard, 1958</p><p>( Pseudomelatomidae, genus assignment uncertain)</p><p>Turris saldanhae Barnard, 1958: 109, figs 3f, 7.</p><p>Comitas saldanhae – Powell 1966: 15, fig. b7; 1969: 267 (23-279), pl. 205 fig. 1, with query. — Nolf 2011: 1–2, pls 1–2.</p><p>Type material</p><p>Holotype SOUTH AFRICA • Saldanha Bay, off Baboon Point; depth 31 ftm (= 57 m); SAM A1738.</p><p>Remarks</p><p>The shell of the species possesses an anal sinus, which occupies part of the subsutural ramp, similar to species of Comitas . Nervertheless, the radula, as illustrated by Barnard (1958: fig. 3f), consists of duplex marginal teeth, with the accessory limb of the marginal tooth inserted into a rather deep and broad socket on the major limb. This tooth structure is very different from the radulae of Comitas that have been examined (Fig. 3F). Although we cannot determine the exact generic position of the species, the radula type suggests it belongs to the family Pseudomelatomidae .</p><p>Distribution</p><p>South Africa, Namibia, 55–1280 m.</p></div>	https://treatment.plazi.org/id/03FCE539FFC23D15931BFA6D30289BB1	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
03FCE539FFC33D1593EEFE1E33159FB4.text	03FCE539FFC33D1593EEFE1E33159FB4.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Sibogasyrinx variabilis (Schepman 1913) Kantor & Fedosov & Puillandre 2025	<div><p>Sibogasyrinx variabilis (Schepman, 1913) comb. nov.</p><p>Fig. 36H</p><p>Surcula variabilis Schepman, 1913 (part.): 61(425), pl. 28 fig. 1a.</p><p>Comitas variabilis – Powell 1969: 281 (23-293), pl. 224 fig. 1.</p><p>Schepmania variabilis – Shuto 1970b: 38, pl. 3 figs 1–3.</p><p>Shutonia variabilis – Van der Bijl 1993: 146</p><p>(new generic name for Schepmania Shuto, 1970, non Schepmania Haas, 1913).</p><p>Type material</p><p>Lectotype INDONESIA • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=128.625&amp;materialsCitation.latitude=-2.6666667" title="Search Plazi for locations around (long 128.625/lat -2.6666667)">Ceram Sea</a>; 2°40′ S, 128°37.5′ E; depth 835 m; ZMA 136887.</p><p>Remarks</p><p>The type series consisted of 12 specimens collected from the same station. Later, Shuto (1970b) observed that the series actually included three different species and described two of them based on the syntypes, Makiyamaia sibogae Shuto, 1970, and Lucerapex schepmani Shuto, 1970 . Shuto applied the name Schepmania gen. nov. variabilis to three specimens. However, the genus was later renamed as Shutonia due to homonymy (van der Bijl 1993).</p><p>Examination of the photograph of the largest specimen (illustrated by Schepman 1913: pl. 28 fig. 1a) revealed that it possesses a subsutural row of nodules, more prominent on the upper whorls, which is characteristic of Sibogasyrinx and Comispira but not of other genera of Conoidea . Therefore, we transfer the species to Sibogasyrinx, rendering Shutonia a junior synonym.</p><p>Distribution</p><p>Type locality.</p></div>	https://treatment.plazi.org/id/03FCE539FFC33D1593EEFE1E33159FB4	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Kantor, Yuri I.;Fedosov, Alexander;Puillandre, Nicolas	Kantor, Yuri I., Fedosov, Alexander, Puillandre, Nicolas (2025): Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae). European Journal of Taxonomy 999: 1-126, DOI: 10.5852/ejt.2025.999.2945, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2945/13301
