Cyclopecten, Verrill, 1897

Dijkstra, H. H. & Maestrati, P., 2015, Pectinoidea (Bivalvia: Propeamussiidae and Cyclochlamydidae) from the southwestern Indian Ocean, African Invertebrates 56 (3), pp. 585-585 : 616

Key to species of Cyclopecten in the southwestern Indian Ocean – Shell small, somewhat higher than wide, lv with prominent radial and weaker commarginal sculpture, intersections with nodules or lamellae, internal ribs lacking .....................................................................................................................1

1 Shell 8.9 mm high, lv opaque and creamy, rv semi-transparent whitish, lv with primary and secondary radial lirae and commarginal lirae, rv with commarginal lamellae ...................................................................................... C. cassiculus sp. n.

– Shell small, circular, lv commarginally sculptured with erect hollow spines, internal ribs lacking ..............................................................................................................2

2 Shell 6 mm high, opaque, whitish, lv with commarginal lamellae and erect hollow spines on lamellae, and with intercalated antimarginal microsculpture on late growth stage, rv similar but with weaker sculpture.................... C. horridus Dijkstra, 1995

– Shell small, subcircular, hYaline, whitish, lv slightlY inflated, rv almost flat, auricles unequal, internal ribs lacking ..................................................................................3

3 Shell 12 mm high, lv with narrow radial riblets and overrunning commarginal lirae, nodules on intersections, rv with closely spaced commarginal lirae ........................ ........................................................................................................ C. kantori sp. n.

– Shell small, circular, lv with delicate reticulate sculpture, no internal ribs ............4

4 Shell 6 mm high, opaque, whitish, lv with delicate, closely spaced radial and commarginal sculpture, rv with commarginal lamellae.. C. kapalae Dijkstra, 1990