Key to the Chinese species of Rhopaltriplasia based on male genitalia

1 Uncus bilobed and rounded; aedeagus without basal prominence ................................. ................................................................................................. R. rotundipetalina sp. n.

­ Uncus bifurcate; aedeagus with basal finger­like prominence .................................... 2

2 Valva constricted at 2/3 length, cucullus with sharp spine at ventrolateral angle .......... ............................................................................................................. R. spinalis sp. n.

­ Valva constricted at 3/5 length, cucullus without spine at ventrolateral angle .............. ................................................................................................... R. insignata Kuznetsov