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Taxon profile

species

Gutless Awningclam
Solemya reidi Bernard, 1980

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Bivalvia - bivalves »  order Solemyida »  family Solemyidae »  genus Solemya

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Description

A medium-size, dark brown species, characterized by a thick periostracum. Posterior ribs low, broad, and widely spaced. With an internal radial strengthening rib. Lacking an alimentary canal. Length to 60 mm.
The reduction of the alimentary canal has long been known in the genus, but this was the first species recorded with no gut in the adult. The larva has a complete alimentary system, which is lost at metamorphosis.
Source: Coan, E. et al., 2000. Bivalve Seashells of Western North America. Marine bivalve mollusks from Arctic Alaska to Baja California.

Interchangeable taxa

This species was long confused with S. (S.) panamensis Dall, 1908, which is not known to occur north of Oaxaca, Mexico (16°N), and differs in being more elongate and in having finer posterior ribs. It is not known whether the latter also lacks a gut. The species merit comparison with Solemya (S.) atacama Kuznetzov and Schileyko, 1984, described from Perú.
Source: Coan, E. et al., 2000. Bivalve Seashells of Western North America. Marine bivalve mollusks from Arctic Alaska to Baja California.

Distribution

Esperanza Inlet, Vancouver Island, British Columbia (49.8°N) [LACM], to Point Loma, California (32.7°) [CSDOMP], forming dense colonies from 40-600 m, usually in areas of high organic content and low oxygen levels, including near effluent outfalls and log storage areas.
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 Solemya reidi Bernard, 1980]
Data retrieved on: 23 November 2013

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