Odostomia altina

Odostomia altina is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.[1][2]

Odostomia altina
Apertural view of a shell of Odostomia altina
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
Superfamily:
Pyramidelloidea
Family:
Pyramidellidae
Genus:
Odostomia
Species:
O. altina
Binomial name
Odostomia altina
Dall & Bartsch, 1909
Synonyms
  • Evalea altina Dall & Bartsch, 1909
  • Odostomia (Evalea) altina Dall & Bartsch, 1909 (basionym)

Description

The ovate shell is white. Its length measures 3 mm. The whorls of the protoconch are deeply obliquely immersed in the first of the succeeding turns, above which only the tilted edge of the last volution projects. The five whorls of the teleoconch are well rounded, feebly contracted at the suture and appressed at the summit. The suture is slightly impressed. The periphery is obscurely angulated. The base of the shell is well rounded. The entire surface is marked by slightly retractive lines of growth and exceedingly fine spiral striations. The aperture is ovate. The posterior angle is acute. The outer lip is thin. The columella is strongly curved, decidedly revolute and provided with a strong fold at its insertion.[3]

Distribution

This species occurs in the Pacific Ocean off California

References
  1. Rosenberg, G. (2011). Odostomia altina Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581092 on 2011-10-26
  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. William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909
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