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Taxon profile

species

Odostomia kromi J. J. van Aartsen, H. Menkhorst & E. Gittenberger, 1984

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Allogastropoda »  family Pyramidellidae »  genus Odostomia

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Odostomia kromi

Author: Aartsen, van, Menckhorst & Gittenberger

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Description

Shell small, slender, more or less cylindrical, white and somewhat diaphanous, with 4,5 slightly to moderately convex, gradually enlarging, teleoconch whorls. Embryonic whorls intorted, with their axis at 135 degrees with the teleoconch axis; their number cannot be determined exactly, because the first protoconch whorl is (partly) hidden in the first teleoconch whorl. Suture simple, not much inclined. Umbilicus closed. Last whorl occupying about 0.6 of the total height of the shell. Aperture oval, somewhat higher than broad; the height is 0.4 of the total height of the shell. Outer lip sharp, neither thickened nor denticulate inside. Inner lip united with the outer lip, sharply, delimited from the body-whorl. Columella concave, with a prominent central tooth. Growth-lines vertical to slightly prosocline. The shells are 1.6-1.95 mm high and 0.75-0,9 mm broad in Getares. Specimens from N. Africa remain smaller and are slightly more slender, reaching 1.65 mm in height and 0.7 mm in breadth.
Aartsen, J.J. van , Menkhorst H. P. & Gittenberger E., 1984. The marine mollusca of the Bay of Algeciras, Spain, with general notes on Mitrella, Marginellidae and Turridae.

Interchangeable taxa

O. kromi is a rather variable species, which in most of its forms resembles O. plicata (Montagu, 1803). In the latter species, however, the embryonic whorls are helicoid, with their axis at 90° with the teleoconch axis; the entire protoconch can be clearly seen from the outside.
Aartsen, J.J. van , Menkhorst H. P. & Gittenberger E., 1984. The marine mollusca of the Bay of Algeciras, Spain, with general notes on Mitrella, Marginellidae and Turridae.
Author: Jan Delsing

Similar species

Odostomia schrami J.J. Van Aartsen, E. Gittenberger & J. Goud, 1998

Links and literature

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Odostomia kromi Aartsen, Menkhorst & Gittenberger, 1984]
Data retrieved on: 23 November 2013

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