(Pereira et al. 2002). This data must be considered preliminary until corroborated by material (e.g. fossil) evidence however.

What appears certain from analysis of the molecular data, calibrated against geological events that would have induced speciation, is that there are 2 major lineages of curassows: one containing only Crax, and another made up of Mitu and Pauxi. The position of the peculiar nocturnal curassow is not well resolved;