Cryptopecten, Dall, Bartsch & Rehder, 1938

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 : 299

Key to species of Cryptopecten from Australia

1 Shell c. 30 mm high, thin, almost circular, weakly inflated, rv more convex than lv, weakly prosocline, auricles unequal, valves with 17–20 squamose, bi-vesicular radial plicae, byssal fasciole narrow ........................................................................................................... C. bullatus

—— Shell with 18–22 vesicular-sculptured radial plicae .................................................................. 2

2 Shell c. 20 mm high, solid, circular to subcircular, moderately to strongly inflated, rv more convex than lv, auricles highly unequal, valves with 18–22 evenly spaced, vesicular-sculptured radial plicae, tripartite when worn, byssal fasciole wide .................................................. C. nux