Tapes dorsatus   (Lamarck,  1818) (Clam)
Organism information awaits expert curation
Class: Bivalvia

Size: Maximum shell length 9 cm, commonly to 7.5 cm.

Color: Outside variable, cream to light buff, with various pattern of brown lines and blotches, often forming a few radial rays. Lunule usually tinged with purple. Interior white, with an orange hue in the umbonal area.

Shell elongate, slightly inflated, squarely oval in outline, with a narrowly rounded anterior margin and a wide, roughly truncate posterior margin. Umbones moderately low, markedly anterior to midline of shell. Posterodorsal margin moderately long, obtusely angulated posteriorly. Lunule lanceolate, bordered by a fine groove. Escutcheon well marked, long and narrow, depressed. Posterodorsal area sloping, set off by an obscure, broad angulation radiating from umbones to posteroventral end of shell. Outer surface ornamented with numerous, small and raised concentric ridges, separated by narrow grooves, becoming slightly lamellate posteriorly. Hinge narrow, with 3 cardinal teeth in each valve, but without lateral teeth. Median cardinal tooth of left valve strongest and widely bifid, appearing like 2 teeth. Posterior cardinal tooth of right valve separated by a gap from median cardinal tooth. Pallial sinus well developed, widely open behind. Dorsal side of pallial line bordered by a row of small scars. Internal margins smooth.

Synonym (s)
Paphia turgida (Lamarck) 1818
Tapes ovulaea (Lamarck) 1818
Tapes turgida (Lamarck) 1818
Tapes watlingi Iredale 1958

Common Name (s)
Economic Importance and Threats

Habitat:  Sandy



Literature Source(s)
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Poutiers, JM (1998) Bivalves FAO species identification guide for fishery purposes. The living marine resources of the western central Pacific. Volume 1: Seaweeds, corals, bivalves and gastropods FAO, Rome 1 686 pp Available at - http://www.fao.org/docrep/009/w7191e/w7191e00.htm
  • Mayhew, R Schooner specimen shells Available at - http://www.schnr-specimen-shells.com/

Page last updated on:2012-11-23

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