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DIMYIDAE |
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Dimya corrugata Hedley, 1902 Description: Shell attached to substrate by right (lower) valve. Shape subcircular, lower valve deeply cupped, upper valve concave, umbo prominent, central on hinge line. Hinge line short. Interior white, corrugated by external sculpture; two muscle scars present, the anterior one small and elongate, the posterior one consisting of two joined circular sections (not visible in Fig. 1); lirae across margin at dorsal end. Exterior with foliaceous concentric layers; lower valve irregular where attached to substrate, both valves with coarse, irregular radial folds. Shell colour translucent white. Size: Up to 16 mm in height. Distribution: The Australian Museum collection holds many specimens from central Qld southwards to Batemans Bay, NSW, from depths of 50-500 m. There are also specimens from WA, but it is not clear if they are the same species or not. Habitat: Lives subtidally, attached to solid substrates such as coral, rock or shells. Comparison: Dimya japonica Habe, 1971 from Japan looks similar. Fig. 1: South east of Clarence River, 405-412 m (C312406, specimen 1) Fig. 2: South east of Clarence River, 405-412 m (C312406, specimen 2) |
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