Odostomia panamensis

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

Odostomia (Heida) panamensis Clessin, 1900

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

Contents

Description

The milk-white, shining shell is small and measures 3.1 mm. It is heavy, elongate-ovate. Its whorls increase regularly in size. The whorls of the protoconch are small, almost completely obliquely immersed in the first of the succeeding volutions. The six whorls of the teleoconch are moderately and evenly rounded, of porcellanous texture, without any apparent marking, and separated by well marked sutures. The periphery of the body whorl is full and rounded. The base of the shell is inflated and well rounded. The aperture is small, decidedly rissoid, almost channeled anteriorly. The posterior angle is acute. The outer is lip decidedly curved backward anteriorly, very thick within but beveled to form a sharp edge. The columella is extremely short, somewhat reflected and connected posteriorly with the very strong parietal callus. This callus is fully as thick as the edge of the outer lip and connects with it at the posterior angle of the aperture, thus forming a complete periostracum. A prominent oblique fold is present on and a little anterior to the insertion of the columella. [2]

Distribution

This species occurs in the Pacific Ocean off the west coast of Panama.

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References

  1. ↑ Clessin, Mart. Chem. Conch. Cab., 2d ed., Pyramid. 1900, p. 120 pl.. XXVIII, fig. 9
  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. ↑ WoRMS (2011). Odostomia panamensis Clessin, 1900. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575885 on 2011-11-10
  4. ↑ Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064:
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