identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
ABB2C0F7BD68573A806FFABCD58D571B.text	ABB2C0F7BD68573A806FFABCD58D571B.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Laetmogone multiradiolus Xiao & Zhang 2025	<html xmlns:mods="http://www.loc.gov/mods/v3">
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            <p> Laetmogone multiradiolus sp. nov.</p>
            <p>Figs 2, 3, 4</p>
            <p>Material examined.</p>
            <p>
                  Holotype South Pacific • 1 specimen;  
                <a title="Search Plazi for locations around (long -176.9515/lat -31.925667)" href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-176.9515&amp;materialsCitation.latitude=-31.925667">from the abyssal plain adjacent to the Kermadec Trench</a>
                 ; 31°55.54'S, 176°57.09'W; depth 5735 m; 3 Nov 2022; preserved in 99 % high grade absolute ethanol; NIWA 164015. 
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            <p>Type locality.</p>
            <p>The abyssal plain adjacent to the Kermadec Trench, the South Pacific, depth 5735 m.</p>
            <p>Diagnosis.</p>
            <p> A member of the genus  Laetmogone with the following features: Colour uniformly dark violet; tentacles 17, with rounded terminal discs, slightly lobed; calcareous ring absent; papillae conspicuous, nine in each dorsal radius; tube feet 12 pairs, placed in single rows along ventrolateral radii. Body-wall ossicles in form of elasipodid wheels, circular in outline, with 4–5 (rarely 6) central rays, 8–17 spokes, nave covered by a calcareous membrane; rods and few irregular ossicles in papillae, tube feet and tentacles; cross-shaped ossicles absent. </p>
            <p>Description.</p>
            <p>Body long, cylindrical, slightly pointed anteriorly (Fig. 2 A, B), 31 cm long, 7.5 cm wide in situ (Fig. 2 C, D), 11 cm long, 1.5 cm wide in preserved state. Colour uniformly dark violet in both vivo and preserved states (Fig. 2 A – F). Tentacles 17, large, 0.6–1 cm in length after several days of fixation, slightly lobed (Fig. 2 E, F). Dorsal papillae conspicuous and nine pairs, arranged in single rows along dorsal radii, 0.7–3 cm long after preservation. Ventrolateral tube feet large, robust and conical, up to 12 pairs, 0.4–0.9 cm in a state of preservation. Mouth ventral, anus terminal. Ventrolateral brim absent. Calcareous ring absent; gonads with numerous branched tubules, arranged in several clusters. Only wheel ossicles in dorsal and ventral body walls (Fig. 3 A – G), with no sharp distinction between the two types. The nave of every wheel covered by a calcareous membrane (Fig. 3 D). Wheels in body wall 0.04–0.21 mm in diameter, central rays 4–5, rarely 6, 8–17 spokes. Rods and wheels in tube feet, papillae and tentacles, wheels similar to those of the body wall. Papillae wheels, rods and few irregular ossicles (Fig. 4 A), rods smooth and stout, curved or straight, occasionally possessing a few little spines on rod ends, 0.2–0.5 mm long. Wheels and curved rods in tentacles (Fig. 4 B), rods up to 0.8 mm in length, with small spines on both ends, some rods terminally bifurcated (Fig. 4 B). Ossicles in tube feet (Fig. 4 C) wheels, rods and irregular ossicles, rods similar in size and shape to those in papillae, irregular ossicles may represent a developmental stage of wheels.</p>
            <p> More details of the hub, rim, central rays, spoke spaces and orientation of wheels from  L. multiradiolus sp. nov. were shown in Fig. 5. </p>
            <p>We counted the spokes and central rays and the diameter was measured in the specimen collected from the Kermadec Trench (Table 1). A sample of 100 wheels taken from the body wall, papillae, tube feet and tentacles (Table 1) revealed the following data:</p>
            <p>A total of 44 % of wheels had four central rays, 55 % had five and only 1 % had six rays. The number of spokes per wheel varied from 8–17 with the majority (84 %) having 9–14 spokes (11 % with 9, 23 % with 10, 11 % with 11, 15 % with 12, 14 % with 13 and 10 % with 14 spokes). The largest wheel (0.21 mm) had only 11 spokes. Only wheels with a diameter of 0.06 mm had the maximum spokes (17). A higher spoke number (15–17) is typical of smaller (&lt;0.1 mm) wheels.</p>
            <p>Etymology.</p>
            <p>The specific name was derived from the Latin words multi (many) and radius (ray or beam), which refers to the large number of the spokes of wheel ossicles.</p>
            <p>Distribution and habitat.</p>
            <p>Known only from the type locality so far. In this field, the holotype was found on flat sedimentary terrains. Benthic species, no swimming behaviour was observed.</p>
            <p>Remarks.</p>
            <p> Laetmogone multiradiolus sp. nov. clearly belongs to the genus  Laetmogone and possesses 12 pairs of tube feet, which makes  Laetmogone multiradiolus sp. nov. unique amongst the known  Laetmogone species. The new species was characterised by a single type of wheel, with 4–5 (rarely 6) central rays and 8–17 spokes. These features place it most similar to  Laetmogone wyvillethomsoni Théel, 1879 . However,  L. multiradiolus sp. nov. can be differentiated from  L. wyvillethomsoni by the following features: (1) The number of tentacles and tube feet were different.  L. multiradiolus sp. nov. had 17 tentacles and 12 tube feet on each side, whereas  L. wyvillethomsoni had 15 tentacles and at least 15 tube feet on each side. (2) In the new species, larger wheels reached 0.21 mm in diameter, whereas in  L. wyvillethomsoni , wheels&gt; 0.16 mm in diameter were not found. (3) Wheels in  L. wyvillethomsoni had 8–14 spokes and some wheels in  L. multiradiolus sp. nov. had spokes&gt; 14 (8–17). </p>
            <p> The new species was also quite different from other  Laetmogone species. Laetmogone multiradiolus sp. nov. differed from  L. maculatus by the absence of rosettes, from  L. violacea Théel, 1879 by the absence of crosses, from  L. scotoeides ,  L. maculata ,  L. fimbriata ,  L. billetti ,  L. ijimai ,  L. biserialis and  L. pervipedata by the absence of two distinct types of wheels. The number of tentacles and tube feet makes  L. multiradiolus sp. nov. and  L. theeli different; the latter species had numerous tube feet and 20 tentacles, whereas the new species had relatively few tube feet and 17 tentacles. The difference between  L. interjacens ,  L. perplexa and  L. multiradiolus sp. nov. is that the new species had large, conspicuous papillae and the papillae of the former two species were small or minute. The dorsal papillae were arranged in two rows along the dorsal radii (four rows along dorsal radii in  L. parvipedata ), which distinguished  L. multiradiolus sp. nov. from  L. parvipedata . </p>
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	https://treatment.plazi.org/id/ABB2C0F7BD68573A806FFABCD58D571B	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.		Pensoft via Plazi	Xiao, Yun-Lu;Zhang, Hai-Bin	Xiao, Yun-Lu, Zhang, Hai-Bin (2025): Morphological and molecular evidence reveals a new species of Laetmogone (Holothuroidea, Elasipodida) from abyssal depths of the south Pacific Ocean. Zoosystematics and Evolution 101 (1): 127-139, DOI: 10.3897/zse.101.135131
FA3FE48DB2CA54019D65C955EE9A1354.text	FA3FE48DB2CA54019D65C955EE9A1354.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Laetmogone Theel 1882	<html xmlns:mods="http://www.loc.gov/mods/v3">
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            <p> Genus  Laetmogone Théel, 1882</p>
            <p>Diagnosis.</p>
            <p>“ Circum oral papillae absent; mid-ventral tube feet absent; dorsal papillae in single rows, double rows or bands; ventrolateral papillae absent; wheels lacking marginal teeth ” [from Hansen 1975: 52].</p>
            <p>Type species.</p>
            <p> Laetmogone wyvillethomsoni Théel, 1879 . </p>
            <p>Other species.</p>
            <p> L. billetti Rogacheva &amp; Gebruk in Rogacheva et al. 2013;  L. biserialis Fisher, 1907 [syn.  L. neglecta Mitsukuri, 1912 ];  L. fimbriata (Sluiter, 1901) [syn.  L. parva Mitsukuri, 1912 ;  L. selenkai Mitsukuri, 1912 ];  L. ijimai (Mitsukuri, 1897) ;  L. interjacens Sluiter, 1901 ;  L. maculata (Théel, 1879) [syn.  L. enisus Sluiter, 1901 ];  L. parvipedata Massin, 1987 ;  L. perplexa Thandar, 1998 ;  L. scotoeides (H. L. Clark, 1913) ;  L. theeli Ludwig, 1893 ;  L. violacea Théel, 1879 [syn.  L. brongniarti E. Perrier, 1886 ;  L. jourdainii Petit, 1885 ]. </p>
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	https://treatment.plazi.org/id/FA3FE48DB2CA54019D65C955EE9A1354	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.		Pensoft via Plazi	Xiao, Yun-Lu;Zhang, Hai-Bin	Xiao, Yun-Lu, Zhang, Hai-Bin (2025): Morphological and molecular evidence reveals a new species of Laetmogone (Holothuroidea, Elasipodida) from abyssal depths of the south Pacific Ocean. Zoosystematics and Evolution 101 (1): 127-139, DOI: 10.3897/zse.101.135131
5993F11E175E569FAA832DCC0A0D36E5.text	5993F11E175E569FAA832DCC0A0D36E5.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Laetmogone wyvillethomsoni Theel 1879	<html xmlns:mods="http://www.loc.gov/mods/v3">
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            <p> Laetmogone cf. wyvillethomsoni Théel, 1879</p>
            <p>Figs 5, 6</p>
            <p> Laetmogone cf. wyvillethomsoni, Bribiesca-Contreras et al., 2022: 78–79, fig. 49.</p>
            <p>Material examined.</p>
            <p>
                  West Pacific • 1 specimen;  
                <a title="Search Plazi for locations around (long 114.354836/lat 18.636667)" href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.354836&amp;materialsCitation.latitude=18.636667">South China Sea</a>
                 ; 18°38.20'N, 114°21.29'E; depth 3568 m; 13 July 2019; preserved in - 80 ° C; IDSSE - EEB-HS 48  . •   1 specimen;  
                <a title="Search Plazi for locations around (long 114.356/lat 18.637)" href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.356&amp;materialsCitation.latitude=18.637">South China Sea</a>
                 ; 18°38.22'N, 114°21.36'E; depth 3566 m; 13 July 2019; preserved in - 80 ° C; IDSSE - EEB-HS 49  . 
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            <p>Description.</p>
            <p>Body cylinder-shaped and slender. 15.6–24 cm long and 5.2–7 cm wide before preservation (Fig. 6 A – E), with the length exceeding the width by more than three times. Mouth anterior, subventral (Fig. 6 A – D). Anus terminal, slightly dorsal. Colour dark violet in both vivo and fixed states. Tentacles 15, of similar size. Odd ambulacrum naked. Conical tube feet 21–28, arranged in single rows on ventrolateral radii. Each dorsal radius with a single row of 12–17 long papillae. Ossicle morphology unavailable due to poor condition of the South China Sea specimens.</p>
            <p>Remarks.</p>
            <p> The South China Sea specimens in this study (Fig. 6) belong to the same species (see Table 2 below, 0–0.8 % K 2 P genetic distance) of the Clarion-Clipperton Zone (CCZ) specimen described by Bribiesca-Contreras et al. (2022) and our phylogenetic analyses showed a well-supported clade (see Fig. 7 below, BS = 90, PP = 0.94). The CCZ specimen resembled  L. wyvillethomsoni closely, as reported by Théel (1879) in the original publication, but no rod-shaped ossicles were found in the dorsal skin. The South China Sea specimens were in poor condition and mostly fragmented, which made it impossible to obtain ossicles from specific tissue sites. Therefore, we only provided molecular data and images and morphological studies of more specimens are needed to determine the specific taxonomic status of this species. The discovery of specimens collected from the South China Sea expanded their geographical distribution from the eastern to the western Pacific Ocean, with a maximum recorded depth of 3568 m. </p>
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	https://treatment.plazi.org/id/5993F11E175E569FAA832DCC0A0D36E5	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.		Pensoft via Plazi	Xiao, Yun-Lu;Zhang, Hai-Bin	Xiao, Yun-Lu, Zhang, Hai-Bin (2025): Morphological and molecular evidence reveals a new species of Laetmogone (Holothuroidea, Elasipodida) from abyssal depths of the south Pacific Ocean. Zoosystematics and Evolution 101 (1): 127-139, DOI: 10.3897/zse.101.135131
