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species

Scaphella biminiensis A. Oleinik, E.J. Petuch & W.C. Aley IV, 2012

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Neogastropoda »  family Volutidae - volutes »  genus Scaphella

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Scaphella biminiensis

Author: Oleinik A.E., Petuch E.J. & Aley IV W.C.

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Description

Type locality.—Off Victory Cay, Bim¬ini Chain, Bahamas in 400-600 m.
Range.—Only known from the type locality.
Discussion.—This is a highly mutable species, with all of the variations of color, sculpture, and form intergrading from shell to shell. Of all of the specimens collected, only one had a thickened, white parietal callus. Most other larger shells had only a thin glaze while the smaller shells had no glaze at all. Strangely enough, the largest specimen also has no glaze. If the development of the parietal callus is a sign of maturity of the shell, it may be safe to assume that this species may not grow much larger than about 40 mm in length. The shells are very similar in size and form to Scaphella bermudezi Clench & Aguayo, 1940 but does not have the spotted color pattern, and are much thinner-shelled. It is very possible that these shells and S. bermudezi may intergrade or even be the same species, but because of the subtle differences in color and structure of the shell, we are treating them as separate species for now until more is known about the taxonomy of Scaphella in the western Atlantic. This species is also similar to Scaphella neptunia Clench & Aguayo, 1940, collected in 644 meters of water off Jamaica, and also resembles Scaphella gaudiati Bail & Shelton, 2001, a species collected off west Guadeloupe. It differs from S. neptunia primarily in having more heavily sculpted early whorls, by lacking a calcarella extending above the second whorl, and by being a solid color instead of having brownish bands or bars. The new species differs from S. gaudiati in being much smaller, thinner shell, by having only five body whorls instead of six, by having a sculpture in the early whorls composed of fine spiral cords, by having a thin outer lip instead of a thick one, by having 2-4 columellar plicae instead of two, and by having a different color.
Oleinik A.E., Petuch E.J. & Aley IV W.C. (2012) Bathyal gastropods of Bimini Chain, Bahamas.
Author: Jan Delsing

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