Donax (Plebidonax) compressa   Lamarck  (Clam)
Organism information awaits expert curation
Class: Bivalvia

Size: Length 21.58-45.75 mm; height 15.9-33.78 mm; width 7.80-15.0 mm

Color: Grayish ash, with obscure lines, three violet rays at the umbo.

Shell triangular, wedge shaped, very much compressed with broad posterior end. Umbos posterior, pointed and elevated. Anterior margin rounded; ventral margin convex; anterior-dorsal margin straight and gradually sloped; posterior-dorsal margin short and abruptly sloped; posterior margin truncated; interior margin smooth. Sculptured with fine concentric and radial striae but the posterior part with rugose concentric striae. Ligament short, dark brown color; lunule on both the valves.
In the left valve the cardinal complex consists of deltoid, elongated anterior tooth and a posterior; anterior lateral absent; posterior lateral present and proximal to the cardinal complex. In the right valve the cardinal complex consists of a knob-like bifid cardial tooth and socketed strong lateral teeth with anterior lateral distal and posterior proximal to the cardinal complex.
Adductor muscle scars well developed. Anterior adductor scar oval, posterior adductor scar triangular at the base and elongated at the posterior side. Sinus equal on both the valves and developed half of the length, sinus rises from posterior adductor scar with convex shaped rounded anterior end and again convex ventral end; falls obliquely to the pallial line and confluent with it.

Synonym (s)
Donax compressa Lamarck, 1835
Donax compressa Reeve, 1854
Donax (Latona) compressa Roemer, 1869

Common Name (s)
Economic Importance and Threats



• Andaman and Nicobar Islands INDIA

Literature Source(s)
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Subba Rao, NV and Dey, A (1986) Contributions to the knowledge of Indian marine molluscs 2. Family Donacidae Records of the Zoological Survey of India. Occasional paper no. 91 ZSI, Calcutta 30 pp Available at - NIO, Goa

Page last updated on:2012-11-07

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