Notochlamys Cotton, 1930

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 : 248-249

Notochlamys Cotton, 1930

Notochlamys Cotton, 1930: 233 . Type species (by original designation): Chlamys anguineus [sic] Finlay, 1927 (replacement name for Pecten undulatus G. B. Sowerby II, 1842 , junior homonym of P. undulatus Nilsson, 1827 ) (= Pecten hexactes [Péron] Lamarck, 1819); Recent, southwestern Australia.

Diagnosis. Strongly plicate, medium-sized Pedini with obvious shagreen microsculpture throughout ontogeny, and with obvious sculpture of few, major radial plicae; most specimens with secondary radial riblets; with highly unequal auricles (anterior much longer than posterior), moderately prominent resilial and dorsal teeth, internal costae with carinate edges near ventral margin, byssal notch deep, ctenolium well-developed.

Distribution.?Pliocene–Recent (Beu & Darragh, 2001). Southwestern, southern and southeastern Australia, living in the subtidal to sublittoral zones beneath rocks or amongst rubble. Earlier (Eocene–Miocene) members assigned to the genus provisionally by Beu & Darragh (2001) are of uncertain taxonomic position.

Discussion. Hertlein (1969: N366) considered Notochlamys to be a junior synonym of the subgenus Mesopeplum Iredale, 1929 , placed in Semipallium Jousseaume in Lamy, 1928. Waller (1991: 31) suggested that these three groups are not synonyms or even closely related and have very different ancestries. Mesopeplum (with entirely far-set commarginal microsculpture) is now placed in Mesopeplini , and Notochlamys and Semipallium (both of which have shagreen microsculpture) are considered to be distinct genera in Pedini ( Waller, 1991: 31; Beu & Darragh, 2001: 58; Waller, 2006a: 20).