Odostomia columbiana

Odostomia columbiana
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia clade Euthyneura clade Panpulmonata
Superfamily:	Pyramidelloidea
Family:	Pyramidellidae
Genus:	Odostomia
Species:	O. columbiana
Binomial name
Odostomia columbiana Dall & Bartsch, 1907 [1]
Synonyms
Odostomia (Evalea) columbiana Dall and Bartsch, 1907

Odostomia columbiana is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.^[2][3]

Description

The white shell is large and elongate-conic. It measures 8.3 mm. The nuclear whorls are small, vitreous, planorboid, deeply obliquely immersed in the first of the succeeding turns, above which only the tilted edge of the last volution is visible. The six post-nuclear whorls are increasing regularly in size, well rounded, very narrowly roundly shouldered at the summits, which renders the sutures well marked. The periphery of the body whorl is somewhat inflated. The base of the shell is well rounded, attenuated anteriorly to reenforce the columella. The entire surface is covered by numerous somewhat wavy, subequal and subequally closely placed spiral lirations, of which about 40 occur between the summit and the periphery and about an equal number on the base of the last whorl. The aperture is large, decidedly patulous anteriorly. The posterior angle is acute. The outer lip is thin at the edge but very thick within. The columella is curved and strongly reflected, free only at its anterior extremity, and provided with a strong oblique fold at its insertion. ^[4]

Distribution

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

References

1. ^ all and Bartsch, Proc. U. S. Nat. Mus., vol. 33, 1907, p. 525
2. ^ Rosenberg, G. (2011). Odostomia columbiana Dall & Bartsch, 1907. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581122 on 2011-10-26
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. ^ William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909

External links

External identifiers for Odostomia columbiana
WoRMS	581122

• To World Register of Marine Species