Odostomia intermedia

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

Odostomia intermedia
Apertural view of a shell of Odostomia intermedia
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
Superfamily:
Pyramidelloidea
Family:
Pyramidellidae
Genus:
Odostomia
Species:
O. intermedia
Binomial name
Odostomia intermedia
(Carpenter, 1857)

Description

The white shell is elongate-ovate. Its length measures 1.4 mm. The 2 ½ whorls of the protoconch are large and form a depressed helicoid spire, whose axis is at right angles to that of the succeeding turns, in the first of which it is about one-fifth immersed. The three whorls of the teleoconch are well rounded. They are marked by very much enfeebled indications of axial ribs, which are best shown at the summit of the whorls, and broad low spiral lirations, of which 7 occur between the sutures. The periphery and the base of the body whorl are well rounded. They are marked by eight low spiral cords, which are somewhat closer spaced about the umbilicus. The aperture is oval. The outer lip is thin, showing the external sculpture within. The columella is slender and curved.[3]

Distribution

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

References
  1. WoRMS (2011). Odostomia intermedia (Carpenter, 1857). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575860 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
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.