Odostomia clausiliformis

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Odostomia clausiliformis
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
Superfamily:
Pyramidelloidea
Family:
Pyramidellidae
Genus:
Odostomia
Species:
O. clausiliformis
Binomial name
Odostomia clausiliformis
Carpenter, 1856 [1]
Synonyms
  • Chrysallida clausiliformis Carpenter, 1856
  • Odostomia (Lysacme) clausiliformis Carpenter, 1856

Odostomia clausiliformis is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. [2] [3]

Contents

Description

The shell is clausiliform. Its length measures 3.8 mm. The two whorls of the protoconch form a depressed helicoid spire, whose axis is at right angles to that of the succeeding turns, in the first of which it is scarcely at all immersed. The first 2½ whorls of the seven of the teleoconch are loosely coiled, strongly rounded, smooth and separated by very strongly impressed sutures. The remaining whorls are moderately rounded, with a strong spiral cord at the summit and another one at the periphery, the two being closely appressed at the sutures. The base of the shell is prolonged, marked by low spiral cords. The aperture are irregularly oblong, decidedly effuse anteriorly. The columella is provided with a strong fold at its insertion. The operculum is paucispiral. [4]

Distribution

This species occurs in the Pacific Ocean off Mazatlán, Mexico.

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References

  1. ↑ Carpenter, Cat. Mazatlan Shells, 1856, p. 426.
  2. ↑ WoRMS (2011). Odostomia clausiformis Carpenter, 1857. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575828 on 2011-10-26
  3. ↑ Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064:
  4. ↑ W.H. Dall & P. Bartsch, A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, 1909
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