Odostomia nuciformis

Odostomia nuciformis
	Apertural view of the shell of Odostomia nuciformis
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia; clade Euthyneura; clade Panpulmonata
Superfamily:	Pyramidelloidea
Family:	Pyramidellidae
Genus:	Odostomia
Species:	O. nuciformis
Binomial name
	Odostomia nuciformis; Carpenter, 1864
Synonyms
	Aartsenia orcia Carpenter, 1864; Aartsenia nuciformis Dall & Bartsch, 1909; Odostomia (Amaura) orcia Carpenter, 1864; Odostomia (Amaura) nuciformis Dall and Bartsch, 1909 ;

Odostomia nuciformis is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.^[3]^[4]

Description

The large, shortly ovate shell is yellowish to milk-white. Its length measures 7.7 mm. The whorls of the protoconch are deeply immersed; only half of the last turn is seen in tilted position when viewed from above. The five whorls of the teleoconch are increasing rapidly' in size. They are well rounded, having their summits closely appressed to the preceding whorl. The suture is moderately well impressed. The periphery and the base of the body whorl are well rounded. The ovate aperture is rather large, and white within. The posterior angle is acute. The outer lip is moderately thin at the edge but thicker within. The columella is short, strongly curved and with a strong oblique fold at its insertion. It is reinforced by the attenuated base. The parietal wall is covered by a thin callus.^[5]

Distribution

This species occurs in the Pacific Ocean off Washington, USA

References

^ Carpenter, Ann. Mag. Nat. Hist., 3d ser., vol. 15, 1865, p. 30
^ Dall and Bartsch, Proc. U. S. Nat. Mus., vol. 33, 1907, p. 530, pi. 48, figs. 3, 3a.
^ Rosenberg, G. (2011). Odostomia nuciformis Carpenter, 1864. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581234 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.
^ William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909

External links

[1] Carpenter, Ann. Mag. Nat. Hist., 3d ser., vol. 15, 1865, p. 30

[2] Dall and Bartsch, Proc. U. S. Nat. Mus., vol. 33, 1907, p. 530, pi. 48, figs. 3, 3a.

[WoRMS-3] Rosenberg, G. (2011). Odostomia nuciformis Carpenter, 1864. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581234 on 2011-11-10

[4] 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.

[5] William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909

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