Odostomia hipolitensis

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

Odostomia hipolitensis
Apertural view of the shell of Odostomia hipolitensis
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
Superfamily:
Pyramidelloidea
Family:
Pyramidellidae
Genus:
Odostomia
Species:
O. hipolitensis
Binomial name
Odostomia hipolitensis
Dall & Bartsch, 1909

Description

The shell is very elongate-ovate, bluish-white, measuring 3.5 mm. The whorls of the protoconch are deeply obliquely impressed in the first of the succeeding turns. The five whorls of the teleoconch are well rounded. They are marked by four strong spiral cords between the sutures, which are separated by narrow, deeply incised channels. In addition to these spiral cords the whorls are marked by weak axial ribs which extend only feebly to the first supra-peripheral cord, rendering the junction with the cords feebly nodulous. The sutures are strongly constricted, not channeled. The periphery of the body whorl is marked by a spiral cord. The base of the shell is rounded, slightly channeled anteriorly. It is marked by nine spiral cords which become successively weaker and closer spaced from the periphery to the umbilical area. The spaces between the cords are marked by numerous slender axial threads. The aperture is oval and effuse anteriorly. The posterior angle is acute. The outer lip is thin, showing the external sculpture within. The columella is moderately strong, twisted, strongly reflected, reinforced by the base and provided with a strong fold at its insertion.[3]

Distribution

This species occurs in the Pacific Ocean off San Hipolito Point, Lower California.

References
  1. WoRMS (2011). Odostomia hipolitensis Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575858 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. William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909
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