Odostomia quadrae

Odostomia quadrae
	Apertural view of Odostomia quadrae
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Family:	Pyramidellidae
Genus:	Odostomia
Species:	O. quadrae
Binomial name
	Odostomia quadrae; Dall & Bartsch, 1910
Synonyms
	Evalea quadrae (Dall & Bartsch, 1910); Odostomia (Evalea) quadrae Dall & Bartsch, 1910;

Odostomia quadrae is a species of sea snail. It is a marine gastropod mollusc in the family Pyramidellidae.^[2]^[3]

Description

The milk-white shell is elongate-ovate, umbilicated, and measures 6.2 mm. The nuclear whorls are deeply, obliquely immersed in the first of the post-nuclear turns, above which only the tilted edge of the last whorl projects. The six post-nuclear whorls are moderately rounded. They are marked by faint lines of growth, and numerous microscopic spiral striations. In addition, the body whorl shows many shallow dents. The periphery of the body whorl and the moderately long base are somewhat inflated and well rounded. They are also marked like the spire. The large aperture is oval, while the posterior angle is acute. The outer lip is thin, while the inner lip is very oblique, slightly curved, and strongly revolute, extending partly over the umbilicus. It has a moderate fold anterior to its insertion. The parietal wall is glazed with a thin callus.^[4]

Distribution

This species lives in the Pacific Ocean off Vancouver Island, British Columbia.

References

^ Dall and Bartsch, Dep. Mines, Geol.Surv., Canada, 1910, pp. 17-18, pi. 2, fig. G.
^ Rosenberg, G. (2011). Odostomia quadrae Dall & Bartsch, 1910. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581244 on 2011-11-10
^ 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.
^ Paul Bartsch, Proceedings of the U.S. National Museum :42; 1912

External links

[1] Dall and Bartsch, Dep. Mines, Geol.Surv., Canada, 1910, pp. 17-18, pi. 2, fig. G.

[WoRMS-2] Rosenberg, G. (2011). Odostomia quadrae Dall & Bartsch, 1910. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581244 on 2011-11-10

[3] 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.

[4] Paul Bartsch, Proceedings of the U.S. National Museum :42; 1912

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