Nematode-induced demasculinisation of Dolichopus males (Diptera: Dolichopodidae) Author Kahanpää, Jere text Zootaxa 2008 1689 51 62 journal article 10.5281/zenodo.180614 549e79e9-bf81-4d14-9633-8af319a5c9dd 1175-5326 180614 Dolichopus spretus Loew, 1871 Dolichopus spretus Loew, 1871 : 259 The type locality of Dolichopus spretus is Västergötland, Sweden ( Negrobov 1991 ). Like the previous species, it is characterised by very small male genitalia, a broad face and the absence of secondary sexual characters typical for the genus. In all aspects it is close to D. vitripennis Meigen. D. spretus has been found in Sweden (the type locality), West Siberia and Russian Far East ( Negrobov 1991 ). Parent (1938) , Negrobov (1991) , Grichanov (2004) and Yang et. al. (2006) treated it as a valid species. D. spretus appears to be yet another nematode-induced aberration, but no material was available for study and the status of this species could not be confirmed. It is probably a synonym of D. vitripennis , but the possibility of synonymy with D. fraterculus cannot be excluded, since the latter species has occasionally very dark, blackish femora like D. vitripennis .