Acar plicata   (Dillwyn,  1817) (Clam)
Organism information awaits expert curation
Class: Bivalvia

Size: 30 mm

Color: White to dirty white, tinged with orange or pink.

Shell equivalve, inequilateral with umbones at the anterior 1/3 of length. Outline almost rectangular, longer than high, often irregular with a distinct keel at the posterior end. Ligament posterior to beaks. Coarse sculpture, consisting of lamellae crossed by radial riblets more prominent posteriorly. Taxodont hinge, central teeth smaller, marginal teeth larger. Adductor muscle scars slightly raised. Inner margin crenulate. Ventral margin with a narrow byssal sinus. The small size and the decussate sculpture dominated by concentric lamellae which are somewhat raised at the posterior part and the prominent muscle scars are diagnostic for the species.

Synonym (s)
Arca plicata Dillwyn, 1817
Arca plicata cf. divaricata (Moazzo, 1939)
Barbatia plicata Dillwyn [Di Geronimo and Robba], 1979
Acar (Acar) plicata Prashad, 1932
Acar plicata Satyamurti, 1956
Acar plicata Bigs, 1973

Common Name (s)
Economic Importance and Threats

Habitat:  Reef Associated,Rocky
Trophic Level:  Consumer
Prey:  Plankton


• Tamil Nadu, Pamban INDIA
• Tamil Nadu, Shingle Island INDIA
• Andaman and Nicobar Islands, Andaman Islands INDIA
• Lakshadweep INDIA

Literature Source(s)
  • Oliver, PG; Holmes, AM; Killeen, lJ and Wood, H (2004) Annotated checklist of the marine Bivalvia of Rodrigues Journal of Natural History Taylor and Francis 38 3229-3272 Available at -
  • Zenetos, A; Gofas, S; Russo, G and Templado, J CIESM Atlas of exotic molluscs in the Mediterranean CIESM Available at -
  • Sealifebase Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Surya Rao, KV and Subba Rao, NV (1991) Mollusca State fauna series 2: Fauna of Lakshadweep ZSI, Calcutta 273-362 Available at - NIO, Goa

Page last updated on:2012-09-12

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