Taxonomic revision of Paraustrosimulium Wygodzinsky & Coscarón: reassignment of Austrosimulium colboi and description of P. obcidens n. sp. from Western Australia

The hitherto monotypic South American genus Paraustrosimulium Wygodzinsky & Coscaron is revised to accommodate two Australian species: Austrosimulium colboi Davies & Gyorkos and Paraustrosimulium obcidens n. sp. The generic diagnosis is updated and the eastern Australian species Paraustrosimulium colboi (Davies & Gyorkos) n. stat. is re-described, including the male for the first time. The Western, Australian sister species of P. colbo , namely P. obcidens Craig, Moulton Currie n. sp. is also fully described. The relationship of Paraustrosimulium to other simuliid genera is discussed, as are aspects of historical biogeography.