CZ EN
SEARCH  

Taxon profile

species

Acteon traskii Stearns, 1897

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Allogastropoda »  family Acteonidae »  genus Acteon

Images

Acteon traskii

Author: Oldroyd, I.S.

Taxon in country check-lists*

* List of countries might not be complete

Size

Length of shell, 11 mm ; length of body whorl, 9 mm; breadth, 6 mm. (Stearns.)

Description

Shell small, conical above, cylindrical, rather solid, opaque, somewhat glossy ; sculpture consisting of numerous, fine, spiral, impressed lines or grooves, which become wider toward the base of the body whorl, making the sculpture of the lower portion of the shell lirate; part of the lirae are slightly grooved and in some cases show a tendency to run in pairs ; the grooved lines are not quite regular in their relative distances, and some are deeper than others ; the surface is otherwise sculptured by sharp, close-set, incremental lines; these latter are subordinate to the spiral sculpture and are more conspicuous on the lower part of the body whorl. Color dull-cream white, often with two obscure, broad, pale rufous bands on the body whorl. Spire short, obtusely conical. Whorls six (probably apex in example somewhat eroded) ; suture distinct, narrowly channeled. Aperture about two-thirds the length of the shell (not quite 9 mm.), acutely angular above, rounded and effuse below, finely lirate and glossy within, with a thin glazing on the body whorl. Outer lip thin, simple. Columella short and flexuous, with a conspicuous fold, curving around the same and thickening the edge of the lip, which is moderately produced in the umbilical region.
Source: Oldroyd, I.S. The Marine Shells of the West Coast of North America. Volume II.1.

Distribution

San Diego, California, to Panama. Fossil Pleistocene ; described from a fossil.

Interesting facts

TYPE in United States National Museum, No. 148241. Type locality, San Diego, California.
Author: Jan Delsing

Links and literature

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Acteon traskii Stearns, 1897]
Data retrieved on: 23 November 2013

Contributions to BioLib

Help us to expand this encyclopedia! If you are logged in, you can add new subtaxa, vernacular and scientific names, texts, images or intertaxon relationships for this taxon.

Comments