PECTINIDAE

Mirapecten rastellum

(Lamarck, 1819)

Figure

 

Holotype

Original name   Pecten rastellum Lamarck, 1819
Autoreference   Lamarck, 1819: 166, no. 14.
Reference   Lamarck, J.B.P.A. de, 1819. Histoire naturelle des animaux sans vertèbres [...], vol. 6 (1), Paris. 343 pp.
Type data   Holotype (pr: H 32.5 mm, L 34.5 mm, D 8.5 mm) Muséum d'Histoire Naturelle, Geneva (MHNG 1088/24). Type locality: "Les mers du nord" [incorrect locality]; Philippines, Cebu, Mactan, off Punta Engano, designated by Dijkstra (1994: 474) [ICZN, 1999: 87, recommendation 76A.2].
Description

  Shell up to 40 mm high, most specimens to c. 25 mm, subcircular, left valve flattened, right valve more inflated, slightly inequivalve and equilateral, auricles somewhat unequal in shape and size, umbonal angle c. 85-90 degrees, internal lirae with rib carinae in most specimens (lacking in a few), hinge teeth weak, colour highly variable, white, cream, yellow, red, purple, brownish, uniform or mottled.

  Both valves sculptured with 7-9 evenly spaced radial lirae, with widely spaced curved scales (larger on lv than on rv), more prominent marginally. Lirae and interspaced equally wide. Auricles with commarginal microsculpture (almost lacking on disc), anterior auricle of rv also with 2-3 radial riblets, dorsal margin spinose. Byssal notch moderately deep, functional ctenolium with 5-8 teeth.

Distribution

 

SW Pacific, Philippines (TL)

Habitat  Living sublittorally amongst coral rubble on sandy bottoms.