Odostomia whitei

Odostomia whitei
	Drawing of a shell of Odostomia whitei
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia; clade Euthyneura; clade Panpulmonata
Superfamily:	Pyramidelloidea
Family:	Pyramidellidae
Genus:	Odostomia
Species:	O. whitei
Binomial name
	Odostomia whitei; Bartsch, 1927 [1]
Synonyms
	Evalea whitei (Bartsch, 1927); Odostomia (Evalea) whitei Bartsch, 1927;

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

This species was named after C.E. White.

Description

The bluish white shell is very small. Its length measures 2.2 mm. It has an elongate-ovate shape. The whorls of the protoconch are smooth, and deeply obliquely immersed in the first of the turns of the teleoconch above which the tilted edge of the last volution only projects. The spire of the protoconch is so obliquely placed that it gives the apex of the shell a truncated appearance. The 4.8 whorls of the teleoconch are very slightly rounded, and not appressed at the summit. They are marked by rather strong, and deeply incised spiral lines ; one a little heavier than the rest is situated a little below the summit and gives to this the appearance of being slightly keeled. In addition to this sculpture the whorls are marked by rather coarse lines of growth. The periphery of the body whorl is angulated. The base of the shell is short, well rounded, and lacks an umbilicus. It is marked by the continuation of the axial ribs and incised spiral lines which equal those on the spire in strength. The aperture is pear-shaped. The posterior angle is acute. The outer lip is thin. The columella is slightly curved, reflected over and appressed to the base for its posterior two-thirds. It is provided with a strong, oblique fold opposite the umbilical chink. The parietal wall is covered with a heavy callus.[1]

Distribution

The type species was found in the Pacific Ocean off Point Firmin, California.

References

P. Bartsch, New West American Mollusks, Proceedings of the United States National Museum, 70(2660): p. 19.
Rosenberg, G. (2011). Odostomia whitei Bartsch, 1927. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581271 on 2012-01-12
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.

External links

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[Dall-1] P. Bartsch, New West American Mollusks, Proceedings of the United States National Museum, 70(2660): p. 19.

[WoRMS-2] Rosenberg, G. (2011). Odostomia whitei Bartsch, 1927. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581271 on 2012-01-12

[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.