Living Scallops of Australia and Adjacent Waters (Mollusca: Bivalvia: Pectinoidea: Propeamussiidae, Cyclochlamydidae and Pectinidae) Author Dijkstra, Henk H. Author Beu, Alan G. text Records of the Australian Museum 2018 Rec. Aust. Mus. 2018-05-23 70 2 113 330 http://dx.doi.org/10.3853/j.2201-4349.70.2018.1670 journal article 10.3853/j.2201-4349.70.2018.1670 2201-4349 5299017 8084C Key to species of Decatopecten from Australia 1 Shell c. 120 mm high, valves inequivalve and inequilateral, lv flat to weakly inflated, rv more convex, auricles subequal, 9–13 radial plicae, fine to coarse lamellae on plicae, secondary radial riblets in late growth stage, byssal notch shallow, byssal fasciole moderately wide, ctenolium weak .................................................................. D. radula —— Shell oblong, with 5–7 radial plicae .......................................................................................... 2 2 Shell c. 45 mm high, almost equally convex, equivalve and equilateral, auricles subequal, 5 radial plicae, rarely 6–7, secondary radial riblets on plicae and interstices in late growth stage, byssal notch, byssal faciole and ctenolium lacking in adult stage .............................................................................................................. D. strangei