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LUCINIDAE |
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Monitilora ramsayi (E.A. Smith, 1885) Description: A small-sized, thick-shelled lucinid. Shape subcircular, umbones on midline; lunule sunken, anterior dorsal margin weakly concave, other margins smoothly rounded; shell moderately inflated. Exterior with closely spaced commarginal ridges, sometimes beaded, interspaces with axial threads. Interior smooth or pitted inside pallial line, weakly radially lined beyond pallial line; posterior muscle scar oval, anterior longer and narrower; pallial line continuous. Hinge with left valve with small cardinal and no lateral teeth; right valve with single small cardinal tooth and a small anterior lateral. Ligament in long groove. Shell white. Size: Up to 25 mm in length. Distribution: Endemic to Australia: Torres Strait, Qld, southwards to Jervis Bay, NSW. Habitat: Subtidal in sand, down to 200 m. Most specimens are from beach washup. Moderately common. Comparison: This species has strong commarginal sculpture and radial sculpture between the concentric ribs, but not crossing them. In this character it is similar to Notomyrtea botanica but the two species have different outlines. Fig. 1: Middle Harbour, Sydney, NSW (C.363098) |
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