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LUCINIDAE |
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Codakia tigerina (Linnaeus, 1758) Description: A large-sized, thick-shelled, brightly coloured lucinid. Shape nearly circular, umbo central, lunule small, deep. Exterior with close, regularly spaced commarginal ridges crossed by dense, regular radials forming nodules at intersections, stronger anteriorly. Interior pale yellow, pink dorsally; margin smooth or weakly lirate; posterior muscle scar rounded, anterior muscle scar elongate. Hinge strong, with 2 cardinal teeth in each valve. Left valve with 1 large anterior lateral and 2 smaller posterior laterals; right valve with a small anterior lateral and a small posterior lateral. Ligament long, internal. Shell colour white externally, yellow with a pinkish red rim internally. Size: Up to 137 mm in height. Distribution: Tropical Indo-West Pacific, including northern Australia. In eastern Australia reported from northern NSW, but rarely extending as far south as Sydney as vagrants. Habitat: Lives in sand or seagrass beds down to 30 m. Comparison: Codalia rugifera differs by not having the yellow and pink colour internally, and by having the external sculpture coarse and irregular. Fig. 1: Hayman Island, Queensland (C.442652) |
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