Propeamussium, de Gregorio, 1884

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 : 122

Key to species of Propeamussium from Australia

1 Shell c. 50 mm high, slightly oblong, hyaline, lv almost smooth, commarginal sculpture near ventral margin, 8–10 delicate internal riblets .............................................................................................................. P. alcocki

—— Shell oblong, auricles somewhat raised .................................................................................... 2

2 Shell c. 25 mm high, hyaline, brownish, lv smooth and glossy, 10 internal riblets slightly nodulose at distal ends ................................................... P. caducum

—— Shell small, circular, flattened, lv with reticulate sculpture ...................................................... 3

3 Shell c. 15 mm high, opaque, 12 strong internal riblets without distinct terminal nodules ..................................................................................... P. meridionale

—— Shell large, circular, lv with delicate commarginal growth lines .............................................. 4

4 Shell c. 55 mm high, hyaline, creamy or brownish, lv almost smooth, 8 strong, broad internal riblets ....................................................................... P. sibogai —— Shell small, circular, flattened, weakly sculptured .................................................................... 5

5 Shell c. 19 mm high, hyaline, pale brown or witish, lv with very weak reticular sculpture in early ontogeny, 7–9 internal riblets .............................. P. siratama

—— Shell large, circular, rather solid, lv radially sculptured ........................................................... 6

6 Shell c. 60 mm high, opaque, whitish, lv with delicate radial sculpture in early growth stage, commarginal lamellae near ventral margin, 10 internal riblets .............................................................................. P. watsoni