Odostomia rinella

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Odostomia rinella
Odostomia rinella 001.png
Apertural view of shell of Odostomia rinella
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Family: Pyramidellidae
Genus: Odostomia
Species:
O. rinella
Binomial name
Odostomia rinella
Dall & Bartsch, 1909
Synonyms
  • Chrysallida rinella (Dall & Bartsch, 1909)
  • Odostomia (Chrysallida) rinella Dall & Bartsch, 1909

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

Contents

Description

The cream-colored shell has an elongate-ovate shape. Its length measures 2.3 mm. The whorls of the protoconch number at least two. They form a smooth, depressed helicoid spire, which is obliquely three-fifths immersed in the first of the succeeding turns. The five whorls of the teleoconch are moderately rounded, strongly contracted at the sutures, and somewhat shouldered at the summits. They are marked by strong, tuberculated axial ribs and four spiral cords almost as strong as the ribs between the sutures which renders their junction with the ribs tuberculate. Of the ribs which are slightly protractive, 17 appear upon the first to third and 19 upon the penultimate whorl. The sutures are strongly channeled. The periphery of the body whorl is marked by a sulcus which is crossed by the continuation of the axial ribs. The base of the shell is moderately long, and well rounded. It is marked by six slender spiral threads, the axial sculpture being reduced to mere lines of growth. The aperture is oval. The posterior angle is obtuse. The outer lip is thin. The columella is oblique, almost straight, decidedly revolute. It is marked with a strong fold at its insertion. [3]

Distribution

The type specimen was found in the Bay of Panama.

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References

  1. ↑ WoRMS (2011). Odostomia rinella Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575900 on 2011-11-10
  2. ↑ Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064
  3. ↑ Dall & Bartsch, A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, p. 146-147; 1909
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