Odostomia mauritiana

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Odostomia mauritiana
Odostomia mauritiana 001.png
Apertural view of the shell of Odostomia mauritiana
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Family: Pyramidellidae
Genus: Odostomia
Species:
O. mauritiana
Binomial name
Odostomia mauritiana
Dall & Bartsch, 1906
Synonyms [1]

Odostomia (Odostomia) mauritiana Dall & Bartsch, 1906

Contents

Odostomia mauritiana is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies. [1]

Description

The small shell measures 2.1 mm. It is umbilicated, elongate-ovate conic, semitransparent, polished. The 2½ whorls of the protoconch are moderately large, helicoid, elevated, about one-fifth immersed in the first of the succeeding whorls and having their axis at a right angle to them. The five whorls of the teleoconch are flattened, angulated at the periphery and weakly shouldered at the summit; the latter falls somewhat anterior to the periphery of the preceding whorl and lends to it a somewhat constricted appearance at the well-impressed suture. The whorls are marked by extremely fine, closely placed, wavy spiral striations, which are visible only under very high magnification. The periphery of the last whorl is somewhat angulated. The base of the shell is very broad, gently rounded, somewhat pinched at the narrow umbilicus. The aperture is elongate-ovate, somewhat prolonged at the junction of the outer lip and columella. The posterior angle is acute. The outer lip is thin, somewhat effuse. The slender columella is decidedly curved, slightly revolute, provided with a prominent oblique fold at its insertion. The parietal wall is covered by a strong callus which lends the periostracum an almost continuous appearance. [1]

Distribution

The type specimen of this marine species was found in the Indian Ocean off Mauritius.

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References

  1. 1 2 3 Dall & Bartsch, Notes on Japanese, Indo-Pacific and American Pyramidellidae; Proceedings of the U.S. National Museum, vol XXX n° 1452; 1906
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