Serratovola Habe, 1951

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 : 304

Serratovola Habe, 1951

Serratovola Habe, 1951: 81 . Type species (by original designation): Pecten tricarinatus Anton, 1838 (junior primary homonym of P. tricarinatus Defrance, 1825 ) (= Pecten rubicundus Récluz in Chenu, 1843); living, China.

Diagnosis. Aequipectinini with an almost flat to somewhat concave left valve and convex right valve, mimicking the shape of Pecten ; subcircular, inaequivalve, slightly inaequilateral, auricles unequal in shape and almost equal in size, radial macrosculpture of solid or hollow segmented plicae, byssal notch and ctenolium rudimentary in late ontogeny. Internal rib carinae prominent near ventral margin. Resilial and dorsal teeth weak.

Distribution. Pliocene–Recent (Hayami, 1989: 16). Indo-West Pacific, living from the intertidal zone to the continental shelf.

Discussion. Habe (1951) introduced Serratovola as an extant genus, but Hertlein (1969: N367) considered it to be a synonym of Pecten . Serratovola differs from Pecten by its much smaller size, its subcircular shape, its less equal auricles, and the hollow sections in the radial plicae.It also has a pattern of commarginal lamellae in early ontogeny that is closely similar to that of Aequipecten species , and distinct from those of any Pectinini . T. R. Waller has advised us that in his opinion, based on its early microsculpture, Serratovola is a member of Aequipectinini convergent on the adaptive form of Pecten , and we follow his opinion.Therefore, we now recognize that the sediment-settling habit and consequent plano-convex shell form characteristic of Pecten (Pectinini) is also found in Mimachlamydini (Minnivola) andAequipectinini ( Serratovola ). This reveals yet again the confusing, convergent adult shell forms of Pectinidae and the need for careful evaluation of phylogeny based on as many characters as possible.