Abstract
We describe five new species of Abantiades from Australia, four from Western Australia (WA) and one from south-east Queensland. Of the four WA species, three are from the Geraldton Sandplains biogeographic region (Abantiades profundussp. nov., A. kolpodessp. nov., and A. patellasp. nov.), and the fourth (A. lepusauressp. nov.) was found in the Eastern Goldfields region. The Queensland species (A. incognitosp. nov.) comes from the south-eastern Queensland biogeographic region. Our five new species demonstrated the importance of wing morphology, genitalia and antennal structure in diagnosing Abantiades species. However, antennal structure as a diagnostic character defining these species highlighted historical problems that, in part, were used to erect Trictena and Bordaia, recently synonymised into Abantiades. To explore this further, we used mtDNA COI 'barcode' sequences and compared our new species with all currently available species for the genus Abantiades.