Excellichlamys Iredale, 1939

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 : 190

Excellichlamys Iredale, 1939

Excellichlamys Iredale, 1939: 366 . Type species (by original designation): Pecten spectabilis Reeve, 1853 ; Recent, unknown locality [(sub)tropical Indo-West Pacific].

Diagnosis. Small to medium-sized Decatopectinini with 9–12 radial plicae, elongate to subcircular, most species with large unequal auricles; with commarginal macro- and microsculpture, prominent noduliferous radial sculpture on auricles, short internal rib carinae, weak resilial hinge teeth (dorsal and intermediate teeth absent), byssal notch shallow, ctenolium obsolete to prominent.

Distribution. Miocene–Recent (Hayami, 1989: 15). Tropical Indo-West Pacific, living in the littoral to sublittoral zones amongst coral or coral rubble on soft sediment.

Discussion. Hertlein (1969: N366) treated Excellichlamys as a subgenus of Semipallium Lamy, 1928 , placed in the Decatopecten group. However, Excellichlamys differs strongly in morphology from Semipallium , which has shagreen microsculpture and is placed in Pedini . Waller (1986: 40) raised Excellichlamys to a genus and placed it in Decatopectinini .