Odostomia telescopium

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Odostomia telescopium
Odostomia telescopium 001.png
Apertural view of the shell of Odostomia telescopium
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Family: Pyramidellidae
Genus: Odostomia
Species:
O. telescopium
Binomial name
Odostomia telescopium
(Carpenter, 1856) [1]
Synonyms
  • Chrysallida telescopium Carpenter, 1856 (basionym)
  • Odostomia (Chrysallida) telescopium (Carpenter, 1856)

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

Contents

Description

The white shell has a very elongate-conic shape. Its length measures 3.1 mm. The two whorls of the protoconch form a moderately elevated helicoid spire which is about one-half obliquely immersed in the first of the succeeding turns. The six whorls of the teleoconch are almost flattened, strongly contracted at the suture and strongly shouldered at the summit. They are marked by strong, vertical, axial ribs, of which 18 occur upon the first, 22 upon the second, 20 upon the third, 22 upon the fourth and penultimate turn. In addition to the axial ribs the whorls are marked by four slender, spiral cords which do not render the ribs tuberculate. The spaces between the cords and the ribs are deep round pits. The sutures are channeled. The periphery of the body whorl are marked by a groove. The base of the shell is somewhat attenuated anteriorly, well rounded posteriorly. It is marked by seven spiral cords which become somewhat diminished in size from the periphery to the umbilical region. The grooves separating the cords are marked by numerous slender axial threads. The aperture is irregularly pyriform, and effuse anteriorly. The posterior angle is acute. The outer lip is thin, showing the external sculpture within. The columella is moderately stout, reflected, reinforced by the base. It is provided with a fold at its insertion. The parietal wall is covered with a thin callus. [4]

Distribution

The type specimen was found in the Pacific Ocean off Mazatlán, Mexico.

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References

  1. ↑ Carpenter, Cat. Mazatlan Shells, 1856, pp. 421, 422.
  2. ↑ WoRMS (2011). Odostomia telescopium Carpenter, 1857. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575914 on 2011-11-29
  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. ↑ A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68,p. 139-140; 1909
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