Odostomia farallonensis

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Odostomia farallonensis
Odostomia farallonensis 001.png
Apertural view of a shell of Odostomia farallonensis
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
Superfamily:
Pyramidelloidea
Family:
Pyramidellidae
Genus:
Odostomia
Species:
O. farallonensis
Binomial name
Odostomia farallonensis
Dall & Bartsch, 1909
Synonyms

Aartsenia farallonensis Dall & Bartsch, 1909

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

Contents

Description

The shell is very elongate-ovate, deeply umbilicated, light yellow. Its length measures 5.5 mm. The whorls of the protoconch are very deeply immersed. The five whorls of the teleoconch are very slightly rounded in the middle between the sutures, more strongly so near the anterior end and toward the summit. The summit is strongly narrowly tabulate. The periphery of the body whorl is inflated. The base of the shell is very strongly suddenly rounded, widely and deeply umbilicated. The entire surface is marked by numerous fine, closely spaced, spiral striations. The aperture is broadly ovate. The posterior angle is obtuse. The outer lip is thin. The columella is very slender, strongly curved, revolute, and provided with a deep fold a little below its insertion. The parietal wall is glazed with a thin callus. [3]

Distribution

This species occurs in the Pacific Ocean off the Farallon Islands, California.

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References

  1. ↑ Rosenberg, G. (2011). Odostomia farallonensis Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581204 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. ↑ William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909
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