Amusium pleuronectes   (Linnaeus,  1758) (Scallop)
Organism information awaits expert curation
Class: Bivalvia

Image copyrights: R. Swainston

Size: Length 43.45-80.75 mm; height 44.85-78.80 mm; thickness 7.90-17.55 mm

Color: Outside of left valve with light to deep pinkish brown of varying shades along concentric growth marks, and with darker radial lines and tiny white dots on umbonal area. Interior of left valve whitish, often with a pinkish hue on margins and central area, and with a brown blotch under the hinge. Right valve white externally and internally.

Shell thin, medium sized (commonly attaining 8 cm in length), laterally compressed, almost circular in outline, gaping anteriorly and posteriorly. Both valves are somewhat convex, the right (lower) valve only a little more inflated and large than the left (upper) valve. Ears moderately small, subequal in size and shape, with the right anterior ear slightly sinuated anteroventrally and devoid of ctenolium. Surface of left valve with 2 broad and very shallow depressed areas radiating from the umbo to anteroventral and posteroventral margins. Outside of shell polished and nearly smooth, with only many faint concentric and radial lines. Interior of both valves with distinct radial ribs, usually in pairs, much narrower than the flat interstices and becoming obsolete on umbonal area. Right valve with 22 to 34 internal radial ribs (usually 26 to 34 in the typical subspecies Amusium pleuronectes pleuronectes, and 22 to 24 in the southern subspecies Amusium pleuronectes australiae).

Synonym (s)
Ostrea pleuronectes Linnaeus, 1758
Pecten pleuronectes Reeve, 1853
Amusium pleuronectes australiae Habe, 1964
(Junior synonym)
Amusium pleuronectes Crichton, 1941
Amusium magneticum Roding, 1798
Amusium pleuronectes nanshaensis Wang & Chen, 1991
Pleuronectia laevigata Swainson, 1840

Common Name (s)
• Asian Moon Scallop
Economic Importance and Threats
Importance:  Commercial

Habitat:  Demersal,Sandy,Muddy
Trophic Level:  Consumer
Prey:  Plankton


• Orissa, Mahanadi Estuary (Lat: 20.32) (Long: 86.75) INDIA
• Tamil Nadu, Parangipettai Coast (Lat: 11.48) (Long: 79.77) INDIA
• Orissa, Off Gopalpur INDIA (Record: 23/09/1909-27/09/1909)
• Orissa INDIA
• Bay of Bengal INDIA
• Andhra Pradesh, Vishakhapatnam INDIA
• Tamil Nadu, Chennai INDIA
• Andaman and Nicobar Islands, Andamans INDIA

Literature Source(s)
  • Tikadar, BK; Daniel, A and Subbarao, NV (1986) Sea shore animals of Andaman and Nicobar Islands The Director, ZSI, Kolkatta 188 Available at - ZSI, Pune
  • (2001) Invertebrate zoology collections Available at -
  • 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
  • (2001) Fauna of Godavari estuary, Andhra Pradesh Estuarine ecosystem series 4 ZSI, Kolkata 1-166 Available at - ZSI, Pune
  • Zoological Survey of India (Eds.) (1998) Fauna Of Mahanadi estuary, Orissa Estuarine ecosystem series no 3 ZSI, Kolkata 1-218 Available at - ZSI, Pune
  • Shanmugam, A; Rajagopal, S and Nazeer, RA Common bivalves of Parangipettai coast Available at - NIO, Goa
  • Tan, KS and Kastoro, WW (2004) A small collection of gastropods and bivalves from the Anambas and Natuna Islands, south China Sea The Raffles Bulletin of Zoology 11 47-54
  • Sealifebase 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 -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Rao, NVS; Rao, KVS and Maitra, S (1991) Marine molluscs State fauna series 1: Fauna of Orissa Zoological Survey of India, Calcutta Part 3 1-175 Available at - NIO, Goa
  • Reef Available at -

Page last updated on:2012-09-14

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