(Sowerby II, 1842)
|Original name||Pecten madreporarum Sowerby II, 1842|
|Autoreference||Sowerby II, 1842: 68, pl. 14, fig. 68.|
|Reference||Sowerby, G.B. (2nd), 1842. Thesaurus Conchyliorum, or figures and descriptions of recent shells. Part 2. Genera Pecten and Hinnites: 45-80. London.|
|Type data||Lectotype (pr: H 20 mm, L 16.4 mm) The Natural History Museum, London (BMNH 1995083/1), designated by Dijkstra & Knudsen (1998: 75), figured in Sowerby (1842: sp. 70, pl. 14, fig. 68). Type locality: Red Sea.|
Shell up to ca. 30 mm high, often stenomorphic or irregular of shape, obliquely oblong, inequivalve, weakly inflated, right valve slightly more convex than left valve, inequilateral, auricles unequal in shape and size, umbonal angle 80-90 degrees, colour creamy or whitish opaque, left valve usually with fine brown maculations, right valve paler.
Both valves sculptured with numerous, irregularly spaced, scabrous fasciated radial riblets. Anterior auricles much larger than posterior, with fine radial riblets and commarginal lamellae. Posterior auricles strongly dorsally declined. Byssal notch deep, byssal fasciole rather broad. Functional ctenolium with 4-6 teeth. Resilium strongly triangularly oblong.
Malagasy, Mauritius, Gulf of Aden, S Red Sea (TL), Thailand, S Japan, Philippines, S China Sea, Indonesia, N Australia, Solomon Islands, Coral Sea, New Caledonia, Samoa Islands
|Habitat||Living littorally, a coral-dwelling species, lodges amongst lower Acropora branche in lagoons on sandy bottoms.|