Diagnosis. Male. Mandible tridentate. Clypeus broad. Aedeagal ventral ramus tubular. Aedeagal dorsal body small.
Remarks. This species-group contains two species: D. brasiliensis Kieffer, 1910 and D. tubulatus Redighieri & Azevedo, 2006 the former recorded from Espírito Santo for the first time in this study.
Distribution. Panama, Venezuela, Guiana, Suriname, Ecuador, Peru, Brazil (Rondônia, Acre, Paraíba, Espírito Santo and São Paulo) and Argentina.