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Bah. & Shelton Scaphella gaudiati n.sp. NOVAPEX 2 (4): 137-140, 20 déc. 2001 Scaphella (Scaphella) gaudiati n.sp. (Gastropoda: Volutidae: Scaphellinae) a new volute from the Caribbean Sea Patrice BAIL 2 Square La Fontaine, 75016 Paris pat.bail@wanadoo.fr France. Douglas N. SHELTON Alabama Malacological Research Center 2370-G Hillcrest Road #236 Mobile, Alabama 36695 U.S.A. unio@aol.com KEYWORDS. Gastropoda, Scaphella, Volutidae, new species, Caribbean, West Indies. ABSTRACT. Scaphella (Scaphella) gaudiati n. sp. is described on basis of four spécimens collected off Saint-Martin (Sint-Maarten) and off Guadeloupe. This new species differs from other related species in color and pattern and is very distinctive from any other members of the genus. INTRODUCTION A récent examination of the genus Scaphella revealed a previously undescribed species in the collection of the Laboratoire de Malacologie, Muséum national d'Histoire naturelle, Paris (MNHN). Up to now known by only four spécimens, the species is markedly distinct from other members of the genus warranting spécifie récognition. Taxonomic placement The genus Scaphella comprises several related polytypic taxa, which hâve been the subject of controversial classification at generic rank as well as at spécifie identification. Based upon the shape of the radula, Pilsbry & Olsson (1953) split Scaphella into three gênera: -Scaphella s. s. with but a single long narrow cusp; -Clenchina with a conic central cusp, flanked by two minute accessory cusps (synonym Rehderia Clench, 1946); -Aurinia H. & A. Adams, 1853 with a pointed central cusp and two well-developed side cusps. Weaver & du Pont (1970) and Bayer (1971) downgraded those three gênera to a subgeneric rank of Scaphella, pointing out the minor taxonomic significance of that radula différence, especially between Clenchina and Scaphella s. s. which are now considered synonyms. Though relegated into synonymy of Scaphella by Emerson & Old, jr. (1979) and Poppe & Goto (1992), the subgenus Aurinia deserves to keep its subspecific status: a chief feature, emphasized by Pilsbry & Olsson, is the thin callus covering the ventral side of the shell often incrusting a muddy deposit. Additional characters such as a complète tricuspidate radula, light structure of the shell, lack of fasciole, obsolète columellar plaits. open pattern of irregularly spaced dots are sufficient to maintain the polytypic Scaphella duhia (Broderip, 1827) in its subgeneric status. On the contrary, Scaphella s. s. includes species with a strong shell, a more or less pronounced fasciole, 2 to 4 well-defined columellar plaits, a dense spiral pattern of dots or bands, and a Y-shaped radula with or without vestigial side cups. Based upon thèse conchological characters only, Scaphella gaudiati can be temporarily placed into Scaphella s. s., pending additional malacological information. SYSTEMATICS Family VOLUTIDAE Rafinesque, 1815 Subfamily SCAPHELLINAE H. and A. Adams, 1858 Genus Scaphella Swainson, 1832 Subgenus: Scaphella s. s. Scaphella (Scaphella) gaudiati n. sp. Figs 1-2,6.8-9 Type Locality off Islet La Désirade, west Guadeloupe, Lesser Antilles, in 250 m (fish trap) living on sand and boulder substrate. Type Material Holotype (length: 89.0 mm, width: 33.3 mm). Laboratoire de Malacologie. MNHN, Paris, taken in fish trap from 250 meters depth, off Islet La Désirade, west Guadeloupe, by Yvon Adonis 137

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Scaphella (Scaphella) gaudiati n.sp. (Gastropoda: Volutidae: Scaphellinae) a new volute from the Caribbean Sea

Patrice Bail and Douglas N Shelton
Novapex 2: 137-140 (2001)

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