Pedum Bruguière, 1792

Dijkstra, Henk H. & Beu, Alan G., 2018, Living Scallops of Australia and Adjacent Waters (Mollusca: Bivalvia: Pectinoidea: Propeamussiidae, Cyclochlamydidae and Pectinidae), Records of the Australian Museum (Rec. Aust. Mus.) 70 (2), pp. 113-330 : 253

Pedum Bruguière, 1792

Pedum Bruguière, 1792 : pl. 178, figs 1–4 (ICZN, 1999: 17, Article 12.2.7; P. Bouchet, MNHN, pers. comm.). Type species (by subsequent monotypy, Lamarck, 1799: 88): Ostrea spondyloidea Lamarck, 1799 (ICZN, 1999: 73, Article 69.3) (= Ostrea spondyloidea Gmelin, 1791 ); Recent, tropical Indo-West Pacific.

Diagnosis. Coral-embedded, dorso-ventrally elongate Pedini with a flattened left valve and weakly convex right valve; microsculpture of numerous scabrous radial riblets and closely arranged commarginal lamellae; anterior auricle strongly curved in late ontogeny, posterior auricle almost absent; hinge teeth lacking, resilial insertions high and narrow, ligament migrating strongly in postero-ventral direction; byssal fasciole broad, byssal gape very wide; ctenolium present early in ontogeny, absent late in ontogeny.

Distribution. Pleistocene and Recent; Pleistocene of Massaua, Eritrea ( Selli, 1973). Tropical Indo-West Pacific, living in the littoral zone embedded in massive hard corals.

Discussion. Hertlein (1969: N364) placed Pedum in the suprageneric Hinnites group, Vaught (1989: 119) in Hinnitini. Habe (1977: 92) established a new subfamily Peduminae [sic, emended to Pedinae ] of Pectinidae . Waller (1993: 200, 203) placed Pedum in Chlamydini and reduced Pedinae to a synonym, but we here adopt Pedinae and Pedini as the valid senior synonyms.