Odostomia capitana

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

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

Evalea capitana Dall & Bartsch,1909

Description

The elongate oval, light yellow, shell is umbilicated. Its length measures 4.6 mm. The whorls of the protoconch are small, deeply, very obliquely immersed in the first of the succeeding turns. The five whorls of the teleoconch are well rounded, with strongly rounded summits. The entire surface is marked by fine lines of growth and exceedingly numerous, very fine, wavy, spiral striations. In addition to these markings the whorls are covered by eight very slender, subequally spaced, obsolete threads between the sutures and four which are. considerably stronger and equally spaced on the base. The periphery and base of the body whorl are well rounded, the latter narrowly umbilicated. The aperture is rather large, broadly ovate. The posterior angle is acute. The outer lip is thin. The columella is slender, very strongly curved and reflected, not reinforced by the base. The parietal wall is covered by a thin callus.[3]

Distribution

This species occurs in the Pacific Ocean off Alaska.

References
  1. Rosenberg, G. (2011). Odostomia capitana Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581114 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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