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GLYCYMERIDIDAE |
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Glycymeris mayi (Cotton, 1947) Description: Shell moderately heavy, equivalve, slightly inequilateral. Shape subovate, wider than high, slightly extended posteriorly. Anterior and posterior ends smoothly rounded. Umbones low, centrally placed. Hinge line curved, 5-10 teeth each side, area between smooth or with a few weak teeth. Ligament in a wide, triangular pit above hinge. Interior with muscle scars well defined with a ridge from inner edge of scar towards umbo, stronger on posterior side; margin strongly denticulate. Exterior with numerous radial ribs, sometimes with secondaries between, crossed by concentric ribs forming beads at intersections. Periostracum absent. Shell colour white. Size: Up to 30 mm in width. Distribution: Sydney, NSW, southwards and around southern Australia to southwestern WA, including Tas. Habitat: Subtidal, known from 84-400 m depth. Fig. 1: Dredged off Port Arthur, Tasmania (Tasmanian Museum specimen, collected R. de Little) Photo courtesy Tasmanian Museum and Art Gallery, http://mollucsoftasmania.org.au. |
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