Odostomia parella

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

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

Contents

Description

The pale yellow shell has an elongate-conic shape. (The whorls of the protoconch are decollated). The five to seven whorls of the teleoconch are flattened in the middle between the sutures, strongly contracted at the periphery, moderately roundly shouldered at the summit. They are marked by rather strong lines of growth and exceedingly fine, closely spaced, microscopic spiral striations. The sutures are strongly contracted. The periphery and the base of the body whorl are well rounded, the latter slightly inflated, marked like the spire. The aperture is ovate. The posterior angle is acute. The outer lip is thin. The columella is very strongly curved, somewhat revolute, reinforced by the base, and provided with a fold at its insertion. [3]

Description

This species occurs in the Pacific Ocean off the Galapagos Islands.

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References

  1. WoRMS (2011). Odostomia parella Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575886 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. 217; 1909