CZ EN
SEARCH  

Taxon profile

subspecies

Bistolida owenii menkeana Deshayes, 1863

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Littorinimorpha »  family Cypraeidae - Cowries »  genus Bistolida »  species Bistolida owenii

Images

Bistolida owenii menkeana

Author: Lorenz, F. & Chiapponi, M.

Description

The shells of this subspecies are smaller (9-13 mm), oval, often callused. The dorsum shows a distinct darker banding which is also present in juveniles. The dorsal zones are darker olive, brown when decorticate. The margins are mostly rounded, slightly bent up and callused. The aperture is gently curved. The extremities are shorter and less distinctly framed. The teeth are very coarse, widely spaced, extending onto the yellowish, slightly convex base. The fossula is flat, the anterior columellar teeth form 4-7 denticles, most of the peristome is smooth. Commonly found on beaches at the southern tip of Mauritius. The first author collected extensively in many places around
Mauritius in 2002 and encountered menkeana-like shells only in two small areas in which owenii owenii did not occur. The recognition of the population from southern Mauritius on the level of a subspecies is done here mainly to point out that it exists. The level of a "form" or "variety" is taken as an offense against the ICZN by particular authors, despite its unquestionable usefullness. Future investigation might lead to different interpretations of the systematic status of menkeana. This interesting and confined population takes a chonchologically intermediate position between owenii and vasta on account of its darker color, callused sides, ribbed peristome and brown transverse banding (features of vasta), combined with smaller size, coarser teeth and Mascarene distribution (features of owenii).
Lorenz, F. & Chiapponi, M., 2005. Revision of the Bistolida owenii- complex (Gastropoda: Cypraeidae) with the description of a new subspecies
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 Bistolida owenii menkeana (Deshayes, 1863)]
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