Male terminalia and their rotation in Tanyderidae (Insecta, Diptera, Nematocera) since the Mesozoic

The structure of the male terminalia and their rotation are reviewed in both extinct and extant genera of Tanyderidae based on new observations and literature. The structure of gonostyli and parameres and the size of cerci show greater variation among extinct taxa than among the extant ones. A bifid aedeagus occurs in representatives of both tanyderid subfamilies, the modern nannotanyderine Peringueyomyina (and probably in Eocene Coramus) and...