Odostomia kelseyi

Odostomia kelseyi
Apertural view of Odostomia kelseyi
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Heterobranchia
Family:	Pyramidellidae
Genus:	Odostomia
Species:	O. kelseyi
Binomial name
Odostomia kelseyi Bartsch, 1912
Synonyms
Odostomia (Heida) kelseyi Bartsch, 1912 (basionym)

Odostomia kelseyi is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies. ^{[1] [2]}

Description

The small, ovatel^{[ check spelling ]} shell measures 2.7 mm. It is bluish-white. The nuclear whorls are small, obliquely immersed in the first of the succeeding turns, above which only the tilted edge of the last volution projects. The six post-nuclear whorls are moderately rounded and narrowly shouldered at the summit. They are marked only by moderately retractive lines of growth and numerous exceedingly fine, spiral striations. The sutures are subchanneled. The periphery of the body whorl is somewhat inflated and well rounded. The base of the shell is moderately long, sloping evenly from the periphery to the anterior extremity. The area about the umbilicus has a pinched-in effect. The base is surrounded by a somewhat tumid area. The aperture is large, broadly oval, somewhat flaring at the anterior lateral angle. The posterior angle acute. The outer lip is thin. The inner lip decidedly curved and slightly revolute. The parietal wall is covered with a thick calls which joins the callus of the columella to the posterior angle of the aperture, rendering the margin of the aperture complete. No fold is visible on the columella. The thin operculum is horny, pauci-spiral, concavo-convex, the convex side being the outer. ^[3]

Distribution

This species occurs in the Pacific Ocean off San Diego, California.

References

1. Rosenberg, G. (2011). Odostomia kelseyi Bartsch, 1912. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581224 on 2011-11-10
2. Turgeon, D.; Quinn, J.F.; Bogan, A.E.; Coan, E.V.; Hochberg, F.G.; Lyons, W.G.; Mikkelsen, P.M.; Neves, R.J.; Roper, C.F.E.; Rosenberg, G.; Roth, B.; Scheltema, A.; Thompson, F.G.; Vecchione, M.; Williams, J.D. (1998). Common and scientific names of aquatic invertebrates from the United States and Canada: mollusks. 2nd ed. American Fisheries Society Special Publication, 26. American Fisheries Society: Bethesda, MD (USA). ISBN   1-888569-01-8. IX, 526 + cd-rom pp.
3. Proceedings of the United States National Museum 42:286 Odostomia (Heida) kelseyi

External links

• To World Register of Marine Species