Odostomia sitkaensis

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Odostomia sitkaensis
Odostomia sitkaensis 001.png
Apertural view of the shell of Odostomia sitkaensis
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Family: Pyramidellidae
Genus: Odostomia
Species:
O. sitkaensis
Binomial name
Odostomia sitkaensis
Clessin, 1900 [1]
Synonyms [2]

Odostomia (Evalea) sitkaensis Clessin, 1900

Odostomia sitkaensis is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies. [3] [4] [5]

Contents

Abbott (1974) considers this species a synonym of Odostomia tenuisculpta Carpenter, 1864 [6]

Description

The elongate-conic shell is very regular in outline, yellowish white, shining. Its length measures 4 mm. The whorls of the protoconch are almost completely immersed in the first of the succeeding volution. The whorls of the teleoconch are moderately rounded, rather high between the sutures, slightly shouldered at the summits. They are marked by many fine lines of growth and numerous tine wavy spiral striations. The latter are more regularly developed and distributed than the lines of growth. The periphery of the body whorl marks the greatest diameter of the shell. The base of the shell, though rather long, falls off rather abruptly at the periphery, then tapers gradually to the anterior end of the columella. It is marked like the spaces between the sutures. The oval aperture is large. The posterior angle is acute. The outer lip is decidedly curved, almost patulous, thin. The columella is long, slender, gently curved, and somewhat reflected, provided with a moderately strong, oblique fold near its insertion. The parietal wall lacks a callus. [2]

Distribution

The type specimen of this marine species was found off Sitka, Alaska.

Habitat

This species is found in the following habitats: [3]

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References

  1. ↑ Clessin, Mart. Chem. Conch. Cab., 2d Ed., Pyramid., 1900, p. 121, pi. XXX, fig. 1
  2. 1 2 Dall & Bartsch, Notes on Japanese, Indo-Pacific and American Pyramidellidae; Proceedings of the U.S. National Museum, vol XXX n° 1452; 1906
  3. 1 2 Rosenberg, G. (2011). Odostomia sitkaensis Clessin, 1900. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=576650 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. ↑ Kantor Yu.I. & Sysoev A.V. (2006) Marine and brackish water Gastropoda of Russia and adjacent countries: an illustrated catalogue. Moscow: KMK Scientific Press. 372 pp. + 140 pls.
  6. ↑ Abbott, R. Tucker. 1974. American Seashells. New York, N.Y.: Van Norstrand Reinhold Company
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