Odostomia cassandra

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Odostomia cassandra
Odostomia cassandra 001.png
Apertural view of Odostomia cassandra
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Family: Pyramidellidae
Genus: Odostomia
Species:
O. cassandra
Binomial name
Odostomia cassandra
Bartsch, 1912
Synonyms

Odostomia (Evalea) cassandra Bartsch, 1912

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

Contents

Description

The small shell measures 2.5 mm. It is, ovate, very thin, semitransparent, light yellow. The nuclear whorls are deeply immersed in the first of the succeeding turns. The four post-nuclear whorls are very strongly, tabulatedly shouldered at the summit, moderately rounded. They are marked by fine incremental Iines, and numerous exceedingly closely spaced, very fine, spiral striations. The sutures are strongly constricted. The periphery of the body whorl is well-rounded. The base of the shell is rather long, well-rounded. The aperture is very large and broadly oval. The posterior angle is decidedly obtuse. The outer lip is very thin. The inner lip is very slender, very oblique, somewhat sinuous, strongly curved, and slightly reflected over the base, but not appressed to it. It is provided with a weak fold some little distance anterior to its insertion. [3]

Distribution

This species occurs in the Pacific Ocean off Skidegate, British Columbia.

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References

  1. ↑ Rosenberg, G. (2011). Odostomia cassandra Bartsch, 1912. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581115 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. ↑ Paul Bartsch, Proceedings of the U.S. National Museum :42; 1912
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