Dolichopus imperfectus Van Duzee, 1921: 240

Potential demasculinized species: unknown.

Dolichopus imperfectus was described from one male collected in Illinois, USA. Although the face is “rather narrow”, the hypopygium is unlike any other in Dolichopus being very small with what appears to be rudiments of cerci (Van Duzee et al. 1921, fig. 176). Such poorly developed genitalia could be caused by nematode infection .