Odostomia defolinia

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

Odostomia (Chrysallida) defolinia Dall & Bartsch, 1909 (basionym)

Contents

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

Subspecies

Description

The conic shell is crystalline, and shining. It measures 3.6 mm. The whorls of the protoconch number one and one-half, and are the greater part immersed in the first of the succeeding turns. The five whorls of the teleoconch are flattened. They are marked by four spiral ridges between the sutures and axial ribs, the intersections of which form low squarish tubercles of which about 11 occur upon the second and 18 upon the penultimate whorl. The sutures are poorly impressed. The periphery of the body whorl is marked by a spiral cord. The base of the shell is attenuated, marked by six equally spaced spiral cords and slender axial threads in the grooves between the cords. The aperture is oval. The posterior angle is acute. The outer lip is thin, showing the external sculpture within. The columella is moderately strong, slightly curved, and provided with a strong fold a little below its insertion. [3]

Distribution

The type specimen of this marine species was found off Margarita Island in the Bay of Panama.

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References

  1. WoRMS (2011). Odostomia defolinia Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575837 on 2011-10-26
  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. William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909