1	Shell rhomboidal, compressed, very thin, no teeth…	Pilsbryoconcha
–	Shell of other shape, pseudocardinal teeth present…	2
2	Shell elongate-rhomboid or kidney-shaped, usually with concave ventral margin, compressed, with a knob-like pseudocardinal tooth in each valve…	Bineurus
–	Shell elliptical, ovate or rounded, ventral margin not concave (convex or straight)…	3
3	Shell elliptical, elongated posteriorly…	Thaiconcha
–	Shell ovate or rounded…	4
4	Pseudocardinal teeth weakly developed, shell winged and truncated posteriorly…	Monodontina
–	Pseudocardinal teeth strongly developed, knob-like…	5
5	Shell without prominent wing, rather thick, usually with dark brown or black periostracum…	Sundadontina
–	Shell winged or somewhat winged…	6
6	Shell somewhat winged, dorsal and posterior margins usually covered by fine wrinkles…	Pseudodon
–	Shell winged, rather thin, usually with light brown periostracum with green radial lines posteriorly; posterior area with weakly developed corrugate plication…	Nyeinchanconcha