Systematic Classification

Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Arcoida
Family: Arcidae
Genus: Arca Scapharca
Species: Scapharca subcrenata
(Lischke, 1869)
Chinese name: ¥q±g

 
Characteristic Features

Shell moderately in size and hard, with elongate shape. Left valve slightly larger than right valve. Radiating sculpture of about 35 ribs. Hinge line straight, teeth numerous. Horse-shaped anterior adductor muscle scar, globular-shaped posterior adductor muscle scar. Shell surface white in colour. Periostracum with fine bristles in the ventral side of ribs, dark brown in colour.

Habitat

Subtidal, soft muddy bottom.
Size

~ 45 mm (shell length).
Distribution

Hong Kong - Southern Waters, Mirs Bay, Tolo Harbour; China, Japan.
Commercial
fishery		 Moderately important. As fresh or processed food.