Odostomia gravida

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Odostomia gravida
Odostomia gravida 001.png
Apertural view of a shell of Odostomia gravida
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Family: Pyramidellidae
Genus: Odostomia
Species:
O. gravida
Binomial name
Odostomia gravida
Gould, 1853 [1]
Synonyms
  • Evalea gravida Dall & Bartsch, 1909
  • Odostomia californica Dall and Bartsch, 1909
  • Odostomia (Evalea) gravida Gould, 1853
  • Odostomia (Evalea) io Dall & Bartsch, 1909 [2]

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

Contents

Description

The large, broadly conic shell measures 6.6 mm. It is milk-white and shining. 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 seven whorls of the teleoconch are moderately rounded, somewhat shouldered at the summit. They are marked by fine lines of growth and numerous, very fine, closely spaced spiral striations. The sutures are well impressed. The periphery of the body whorl is somewhat angulated. The base of the shell is sloping from the periphery to the umbilical area, but slightly rounded. The aperture is ovate. The posterior angle is obtuse. The outer lip is fractured. The columella is short, strong, curved, and revolute, provided with a strong fold at its insertion. The parietal wall is covered with a weak callus. [5]

Distribution

This species occurs in the Pacific Ocean off California.[ citation needed ]

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References

  1. ↑ Gould, Proc. Bost. Soc.. Nat. Hist., vol. G, 1852, p. 376
  2. ↑ ITIS: Odostomia io
  3. ↑ Rosenberg, G. (2011). Odostomia gravida Gould, 1853. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581210 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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