Odostomia elsa

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

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

Description

The yellowish white shell is ovate and umbilicated. Its length measures 6.1 mm. The whorls of the protoconch are very small and deeply immersed in the first of the succeeding turns. The six whorls of the teleoconch are well rounded, with strongly concave summits, forming deeply channeled sutures. They are marked by slightly retractive lines of growth, and exceedingly fine, closely placed, wavy spiral striations. The periphery of the body whorl is well rounded. The base of the shell is short, inflated andmoderately umbilicated. The aperture is ovate. The posterior angle is obtuse. The columella is curved, slightly reflected, not reinforced by the base and provided with an oblique fold at some little distance anterior to its insertion. 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 elsa Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581195 on 2011-11-10
  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. "A Monograph of West American Pyramidellid Mollusks" , William Healy Dall and Paul Bartsch , Smithsonian Institution, 1909]
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