identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
815887A4FFE17A4A03B00DFCFDD3C01F.text	815887A4FFE17A4A03B00DFCFDD3C01F.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Barbadoschiton Sirenko & Anseeuw 2024	<html xmlns:mods="http://www.loc.gov/mods/v3">
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            <p> Barbadoschiton gen. nov.</p>
            <p>Zoobank registration: urn:lsid:zoobank.org:act: 42E1D0F6-E3C7-47F0-AF0F-0CBCDE0AA429</p>
            <p> Type species:  Ischnochiton bromleyi Ferreira, 1985 by monotypy. </p>
            <p>Genus distribution: Off Barbados, Martinique Islands, Flower Garden Banks in the Gulf of Mexico.</p>
            <p>Diagnosis. Chiton very small with rather narrow and rather elevated, solid shell, lateral areas narrow and noticeably raised. Valves IV, V and VI are widest, and the valves II and III proportionately even longer. Central area of intermediate valves and antemucronal area of tail valve with teardrop-shaped granules arranged in quincunx, in pleural part, the granules are lined up in rows inclined towards the jugal part of valve resulting in a net quincunx-pattern. Each granule of central areas with oval megalaesthete pore. Head valve, lateral areas of intermediate valves and postmucronal areas of tail valve with oval granules arranged in quincunx as well. Each granule of head valve, with one megalaesthete pore and 4 micraes- thete pores. Apophyses semioval, wide, connected across the sinus by narrow jugal plate; Slit formula 7/1/4–5. Girdle dorsally covered with wide, strongly bent, regularly imbricating scales, with 10–14 distinct, flat riblets. Marginal fringe with five kinds of elements, among these long, fine needles and ribbed concave spicules.Ventral spicules of two kinds: main flattened, rectangular spicules with appendix on top and three weak longitudinal ribs on external part; and small distally pointed, smooth on the outer side and with two longitudinal grooves on the opposite side of the spicules. The latter are attached in transverse rows with their proximal part between the main ventral spicules. Major lateral teeth of radula with tridentate head, middle denticle longer than others.</p>
            <p>Etymology. Named after the Barbados Island.</p>
            <p> Remarks. The genus  Barbadoschiton gen. nov. based on the set of marginal spicules, should be included in the family  Ischnochitonidae , which includes an externally similar genus  Connexochiton with narrow high valves. From the last genus,  Barbadoschiton gen. nov. differs essentially by: 1) presence of unusual sculpture of tegmentum consisting of drop-shaped granules arranged in quincuncial order on central areas of intermediate valves; 2) structure of teeth of radula with tricuspid head of major lateral tooth; 3) form and structure of two types of ventral spicules. From other genera of the family  Ischnochitonidae , the new genus differs by: 1) the presence of drop-shaped granules located on the central areas arranged quincuncially, with a single pore of megalaesthete; 2) the presence of ribbed marginal spicules with a longitudinal groove; 3) the presence of flattened spicules with three longitudinal ribs on the ventral part of the girdle; 4) the presence of additional ventral sharply pointed spicules with two longitudinal grooves arranged in transverse rows between the main flattened ventral spicules. </p>
            <p> The vast majority of the species of the family Cal- listoplacidae exhibit radial ribs on the head valves, lateral areas of the intermediate valves and on the postmucronal areas of the tail valves. Additionally they have longitudinal ribs on the central areas of the intermediate valves.  Barbadoschiton gen. nov. does not have such ribs. From the genus  Caribbochiton Sirenko et Anseeuw, 2021 , also lacking radial ribs, but having longitudinal ribs on the central areas of the intermediate valves, the new genus differs by the absence of any ribs on the valves. </p>
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	https://treatment.plazi.org/id/815887A4FFE17A4A03B00DFCFDD3C01F	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	Sirenko, Boris;Anseeuw, Bruno	Sirenko, Boris, Anseeuw, Bruno (2024): A new genus of chitons (Mollusca: Polyplacophora) from the Barbados and Martinique Islands, Atlantic Ocean. Ruthenica, Russian Malacological Journal 34 (4): 177-183, DOI: 10.35885/ruthenica.2024.34(4).4, URL: https://doi.org/10.35885/ruthenica.2024.34(4).4
815887A4FFE27A4C00950F2FFAB4C79F.text	815887A4FFE27A4C00950F2FFAB4C79F.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Barbadoschiton Sirenko & Anseeuw 2024	<html xmlns:mods="http://www.loc.gov/mods/v3">
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            <p> Barbadoschiton bromleyi (Ferreira, 1985)</p>
            <p>(Figs 1–5)</p>
            <p> Ischnochiton bromleyi Ferreira, 1985: 195 , figs 4–8.  Connexochiton bromleyi Kaas, Van Belle, 1987: 259 , fig. 117, </p>
            <p>map 32; Sirenko, 2021: 98.</p>
            <p> Type material.   Holotype in California Academy of Sciences, Department of Invertebrate Zoology,  San Francisco (CASIZ 043883) and paratype (CA- SIZ 043884, now disarticulated). </p>
            <p>  Type locality. Barbados,  Six Men’s Bay , 13 ⁰15’N  , 59 ⁰39’W, 30 m. </p>
            <p>Updated description. Animal of small size, body length of the studied specimen 2.5 mm, elongate, rather elevated (dorsal elevation 0.52 in valve V) (Fig. 2G), valves thin, little beaked, carinated, color of tegmentum cream mottled with brown.</p>
            <p>Head valve semicircular, posterior margin widely V-shaped, notched in the middle (Fig. 2A). Intermediate valves rather narrow, anterior margin convex in valve II and straight in other valves (Fig. 2B, C), side margins obliquely rounded, hind margin slightly concave at both sides of the prominent apex, lateral areas strongly raised. Tail valve semicircular (Fig. 2D, H), about twice as wide as long, front marginal most straight, mucro anterior, pointed, postmucronal area decidedly depressed, concave.</p>
            <p>Tegmentum of head valve, lateral areas of intermediate valves and postmucronal area of tail valve covered with small granules (48 x 48 µm) arranged in quincunx, each granule with one pore of megalaesthete and four pores of micraesthetes (Fig. 3A, 5A). Tegmentum of central areas of intermediate valves and antemucronal area of tail valve covered with drop-shaped granules (33 x 25 µm) arranged in quincunx (Fig. 2F, 5B). In pleural areas granules form rows which posteriorly converging to jugal areas resulting in a net quincunx-pattern (Fig. 2C). Each granule with oval pore of megalaesthete (8 x 6 µm) (Fig.2F, 5B).</p>
            <p>Articulamentum weakly developed, translucent, apophyses semioval, continuous across shallow sinus through a well developed jugal plate, slit formula 7/1/4, teeth of insertion plates thickened and smooth (Fig. 2E).</p>
            <p>Girdle of moderate width, only three times nar- rower than valve V, dorsally covered with strongly bent, close set, regularly imbricating scales (30–44 × 62–88 μm) (Fig. B-D, 5E), with 11–14 distinct flat riblets on the exposed part of the scale, interstices as wide as the riblets. Marginal spicules consisting of five kinds: (1) rare long, smooth needles (160–190 × 13–15 μm) (Fig. 3C, 5D) on short bristle; (2) flattened, obtusely pointed spicules (21–27 × 16 μm) (3B, 5G) with three ribs on one side; (3) spicules (55 x 20 µm) (Fig. 3B, 5F) on one side curved from sides and with 7 longitudinal ribs, on the other side with longitudinal groove; (4) numerous, small spicules (32 x 10 µm) (Fig. 3B,C, 5C) with 5 longitudinal ribs and one longitudinal groove; (5) flat, obtuse spicules (40 × 22 μm) (Fig. 3B, 5H) with two warts on upper half.Ventral spicules of two kinds: (1) main flattened, rectangular spicules (48 x 18 µm) (Fig. 3B, 4A, B, 5I) with appendix on top and three weak longitudinal ribs on external part, and (2) small distally pointed spicules (Fig 3B, 4A,B, 5J), smooth on the outer side and with two longitudinal grooves on the opposite side of the spicules (35–50 x 11–12 µm). The latter are attached in transverse rows with their proximal part between the main ventral spicules.</p>
            <p>Radula of the paratype with 35 rows of mature teeth, major lateral teeth of radula with tridentate head, middle denticle longer than others [Kaas, Van Belle, 1987].</p>
            <p>Distribution. Known from the type locality (off</p>
            <p>  Barbados), Flower Garden Banks in the  Gulf of Mexico , and  Martinique Island, 30–84 m.</p>
            <p> Remarks.  Barbadoschiton bromleyi , a distinctive species within the  Ischnochitonidae family, dem- onstrates unique attributes not observed in other chitons.These unique attributes encompass the complex sculpture of its tegmentum and the atypical armament of its girdle.  Barbadoschiton bromleyi is character- ized by the presence of drop-shaped granules with a singular pore of megalaesthete, specifically located on the central areas of its valves. This feature sets it apart from other chitons in the Chitoninae suborder. Moreover, flattened granules with five aesthetes pores are found on the head valve, lateral areas of intermediate valves, and the postmucronal area of the tail valve, further distinguishing  Barbadoschiton bromleyi . </p>
            <p> It’s worth noting that this species exhibits four types of marginal ribbed spiculae, a feature absent in other chitons.Additionally, this species possesses ventral distally pointed spicules with two longitudinal grooves, arranged in transverse rows above the primary flattened ventral spicules, which also exhibit longitudinal ribs. These unique spicules contribute to the classification of  Barbadoschiton bromleyi into a separate genus within the  Ischnochitonidae family. The function of these spicules remains unknown. </p>
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	https://treatment.plazi.org/id/815887A4FFE27A4C00950F2FFAB4C79F	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	Sirenko, Boris;Anseeuw, Bruno	Sirenko, Boris, Anseeuw, Bruno (2024): A new genus of chitons (Mollusca: Polyplacophora) from the Barbados and Martinique Islands, Atlantic Ocean. Ruthenica, Russian Malacological Journal 34 (4): 177-183, DOI: 10.35885/ruthenica.2024.34(4).4, URL: https://doi.org/10.35885/ruthenica.2024.34(4).4
