Lioconcha castrensis   Linnaeus,  1758 (Clam)
Organism information awaits expert curation
Class: Bivalvia

Image copyrights: Schooner specimen shells

Size: Maximum shell length 5 cm, commonly to 4 cm.

Color: Outside of shell creamy white, with some large, dark chestnut brown to almost black, V-shaped markings or zigzag lines. Interior porcelaneous white.

Shell heavy and solid, inflated, subequilateral in shape, only a little longer than high and rounded-ovate in outline. Umbones inflated and rounded, slightly anterior to midline of valves. Posterodorsal margin rounded and steeply curving into the moderately high, faintly truncate posterior margin. Lunule broad, somewhat elevated above shell surface and well demarcated, with a deeply incised peripheral groove. Escutcheon indistinct. Outer surface of shell smooth and shining, only sculptured with fine concentric growth lines. External ligament deeply sunken into posterodorsal margin. Hinge plate strong, with 3 cardinal teeth in each valve and well-developed anterior lateral teeth, 1 in left valve, and 2 in right valve, separated by a deep socket. Anterior and median cardinal teeth not radiating, more or less vertical in direction. Pallial sinus very shallow, reduced to a faint undulation, not extending forwards beyond the posterior adductor scar. Internal margins smooth.

Synonym (s)
Venus catrensis Linnaeus, 1758
Cytherea ornata Lamarck, 1818

Common Name (s)
Economic Importance and Threats
Importance:  Commercial
(Artisanal exploitation and commonly sold for food. The shell is used in local shellcraft.)

Habitat:  Reef Associated, Sandy


• Andaman and Nicobar Islands, Andamans INDIA
• Red Sea
• Andaman and Nicobar Islands, Nicobar INDIA
• Andaman and Nicobar Islands, Camorta INDIA

Literature Source(s)
  • Subba Rao, NV and Dey, A (2000) Catalogue of marine molluscs of Andaman and Nicobar Islands Occasional paper no 187 Records of the Zoological Survey of India ZSI 1-323 Available at - NCL, Pune
  • Allen, GR (2005) Reef fishes of northwestern Madagascar RAP Bulletin of Biological Assessment 31 39-48
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • 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 -
  • Mayhew, R Schooner specimen shells Available at -

Page last updated on:2010-05-25

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