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Taxon profile

subspecies

Erosaria lamarckii redimita Melvill, 1888

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

Images

Erosaria lamarckii redimita

Author: Avon, C.

Taxon in country check-lists*

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Description

-20~30m, By scuba diver near Ko Racha Yai and Ko Racha Noi islands, south Phuket Province, Thailand, 27.43mm., 2013.
The « Lamarck's Cowrie » is a pleasingly spotted common cowrie widely distributed throughout the Indian Ocean and named in honour of the famous French naturalist Jean-Baptiste Lamarck. It is a very variable species in terms of both pattern and form. The uncommon form shown here is characteristic of population endemic to a small area around Phuket Island, Thailand usually referred to as N. lamarckii f. phuketensis, although the author of the name is unclear and it carries no taxonomic authority. This form can be regarded as an extremely callous and depressed variation of L. lamarckii f. redimita (Melvill, 1888) which is itself a short and callous form of N. lamarckii best known from Zanzibar, Natal, and Thailand. The two are sometimes treated as synonymous on the market, treating f. phuketensis as simply a variation of f. redimita. N. lamarckii f. redimita was often treated as a subspecies, but no sufficient genetic evidence was found to support this from the Cowrie Genetic Database Project and now best considered simply as a form. It is a nocturnal omnivore often found to inhabit muddy bottoms, and is usually found from very shallow intertidal zone down to about -50m deep. Typical shell length of N. lamarckii is around 35mm. with giants sometimes exceeding 50mm.; N. lamarckii f. phuketensis is smaller with a typical shell length around 30mm. and rarely exceeding 40mm.
Avon C. 2016 . Gastropoda Pacifica.
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 Erosaria lamarckii redimita (Melvill, 1888)]
Data retrieved on: 23 November 2013

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