PECTINIDAE

Mirapecten mirificus

(Reeve, 1853)

Figure

 

Holotype

Original name   Pecten mirificus Reeve, 1853
Autoreference   Reeve, 1853: sp. 104 [text], pl. 26 fig. 104.
Reference   Reeve, L.A., 1852-1853. Monograph of the genus Pecten. Conchologia Iconica; or, illustrations of the shells of molluscous animals, vol. 8. Reeve, London. Plates 1-35 + captions.
Type data   Holotype (pr: H 27.5 mm, L 30.0 mm) Natural History Museum, London (BMNH 1950.11.14.46). Type locality: Indonesia, Moluccas, Ambon.
Description

  Shell up to c. 40 mm high, somewhat posteriorly oblique, roundly triangular, strongly inequivalve, inequilateral, lv flattened, rv inflated, auricles somewhat unequal in shape and size, umbonal angle c. 90 degrees, internal rib carinae, colour highly variable, cream, yellow, red, orange, purple, brownish to almost black, some specimens mottled.

  Left valve sculptured with 4-5 distinct primary radial costae with widely spaced thorn-like, curled scales, variable in prominence, one secondary costa in interspaces of most specimens, or very weak or lacking on some. Right valve with 7-9 unevenly spaced radial costae (4 main costae more or less bifurcated), secondary costae lacking. Anterior auricle with 4-6 radial riblets, dorsal margin scaly. Byssal notch moderately deep, byssal fasciole rather broad. Functional ctenolium with 4-6 well-developed teeth.

Distribution

 

Mauritius, Thailand, S Japan, Philippines, Indonesia (Ambon, TL), PNG, Coral Sea, New Caledonia, Solomons, Fiji, Hawaii, French Polynesia

Habitat  Living sublittorally amongst coral rubble on sandy bottoms.