Polymesoda erosa   (Lightfoot,  1786) (Clam)
Organism information awaits expert curation
Class: Bivalvia

Size: Maximum shell length 10.5 cm, commonly to 7 cm.

Color: Outside of shell chalky white under the yellowish green periostracum. Interior chalky or porcelaneous white.

Shell equivalve, subrhomboidal-ovate in outline, slightly inequilateral. Umbones moderately inflated, near the midline of shell. Outer surface of valves concentrically striated. Periostracum thick and strongly wrinkled, the umbones often corroded and showing the shell material. Hinge teeth strong. Anterior and central right cardinal teeth bifid, as well as central and posterior left cardinals. Lateral teeth smooth: 1 anterior and 1 posterior laterals in left valve, against 2 in right valve. Pallial sinus inconspicuous.

Synonym (s)
Cyrena moussoni Martens, 1897
Cyrena zeylanica Lamarck, 1818
Geloina coaxans (Gmelin, 1791)
Geloina erosa (Lightfoot, 1786)
Polymesoda coaxans (Gmelin, 1791)
Polymesoda eximia “(Solander)”, Van Benthem Jutting, 1953
Polymesoda proxima (Prime, 1867)
Polymesoda expansa (Mousson, 1849)

Common Name (s)
• Mud Clam (English)
Economic Importance and Threats
Importance:  Commercial
(Widely collected as food, artisanal fishery
Possess high antiviral activity)

Habitat:  Estuarine, Muddy


• Goa, Chorao Island (Lat: 15.41-15.5) (Long: 73.75-73.9) INDIA (Record: 07/2004-07/2005)
• Goa INDIA (Record: 2002)

Literature Source(s)
  • 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
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Clemente, S and Ingole, B (2009) Gametogenic development and spawning of the mud clam, Polymesoda erosa (Solander, 1876) at Chorao Island, Goa Marine Biology Research 5 109-121 Available at - NIO, Goa
  • Chatterji, A., Ansari, ZA., Ingole, BS., Bichurina, MA., Sovetova, M., Boikov, YA. (2002) Indian marine bivalves: Potential source of antiviral drugs Current Science 82(10) 1279-1282 Available at - NIO, Goa

Page last updated on:2011-08-19

Back to Search