Abstract
The endemic Neotropical genus Gaujonia Dognin is revised. Morphological characters and a phylogenetic analysis demonstrate paraphyletic relationships among the species. Four different groups are interpreted to represent four different genera. The G. arbosi group is the only remaining clade in the genus Gaujonia, and the other groups have been arranged into three new genera: Millerana gen. nov., Oculicattus gen. nov., and Cicadoforma gen. nov. Additionally, two other genera Cicadomorphus gen. nov., and Gaujoptera gen. nov. were found using morphological and molecular analyses based on some specimens that were misidentified as Gaujonia spp. A total of five new genera, three new combinations (Cicadoforma vau-nigrum Hampson, comb. nov., Oculicattus renifera Hampson, comb. nov., and Millerana arbosioides Dognin, comb. nov.) and 21 new species (Cicadoforma ocelotus sp. nov., Cicadomorphus chicharra sp. nov., Cicadomorphus chuya sp. nov., Cicadomorphus falkasiska sp. nov., Cicadomorphus lilianae sp. nov., Gaujonia bichu sp. nov., Gaujonia chiqyaq sp. nov., Gaujonia kanakusika sp. nov., Gaujonia sourakovi sp. nov., Gaujoptera amsa sp. nov., Millerana austini sp. nov., Millerana cajas sp. nov., Millerana cundinamarquensis sp. nov., Millerana matthewsae sp. nov., Millerana tigrina sp. nov., Oculicattus boliviana sp. nov., Oculicattus brehmi sp. nov., Oculicattus inca sp. nov., Oculicattus raizae sp. nov., Oculicattus schmidti sp. nov., and Oculicattus uturunku sp. nov.) are established.