Bivalvia | Veneroida
Leal, J.H. 2003. (Ref. 344)
Size / Weight / Age
Max length : 11.9 cm DL male/unsexed; (Ref. 83435); common length : 8.0 cm TL male/unsexed; (Ref. 344)
Benthic; brackish; depth range 0 - 24 m (Ref. 83435)
Climate / Range
Tropical; 43°N - 43°S, 98°W - 34°W
Western Atlantic: from Cape Cod to Argentinian Patagonia, and Gulf of Mexico, 42°N, USA to 41°S, San Matias Gulf, Argentina.
Shell light, elongate, semi-cylindrical, inflated, posterior margin rounded, anterior margin straight but oblique. Weak radial ridge present posteriorly. Surface smooth except for fine concentric lines. Umbones slightly removed from centre of shell in posterior direction, indistinct. Colour: periostracum olive green to brownish yellow.
Maximum depth from Ref. 104454. Intertidal to shallow subtidal, in muddy sand or mud (Ref 344). Inhabits stable sediments with silts and clays and are covered with film of benthic microalgae (Ref. 104234). Also occurs in estuaries. Suspension feeder (Refs. 104108, 104234). Builds permanent passageways from 50 to 70 cm deep (Ref. 104108). Members of the class Bivalvia are mostly gonochoric (Ref. 833), some are protandric hermaphrodites (Ref. 104221). Life cycle: Embryos develop into free-swimming trocophore larvae, succeeded by the bivalve veliger, resembling a miniature clam.
IUCN Red List Status (Ref. 114614)
CITES status (Ref. 94142)
Threat to humans
Fisheries: commercial; aquaculture: likely future use; bait: occasionally
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Estimation of some characteristics with mathematical models