Chasmoptera is a genus in the Nemopteridae (the spoonwing family of insects). The genus, which consists of three species, is wholly confined to Western Australia.[1]
The genus was first described by William Forsell Kirby in 1900,[1] [2] and the type species is Chasmoptera huttii.[1]
A key feature of Chasmoptera is the "elaborate extended hindwings, with apical dilations arranged in a “ribbon” or “spoon” shape".
Kirby describes the genus as follows (but only lists the one species, Chasmoptera huttii): Later work uses both wing and genital morphology to distinguish both species and genera.