Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Galloanserae Sibley, Ahlquist & Monroe Jr., 1988 see Subcohort Galloanserae Sibley, Ahlquist & Monroe Jr., 1988
       [Order] Galliformes Temminck, 1820 - fowl
         Family Cracidae Vigors, 1825 - chachalacas, curassows, guans
           Subfamily Cracinae Vigors, 1825 - curassows
             Genus Pauxi Temminck, 1813
               Pauxi unicornis Bond & Meyer de Schauensee, 1939 - southern helmeted curassow
                 1 Pauxi unicornis unicornisᵀ Bond & Meyer de Schauensee, 1939
                 2 Pauxi unicornis koepckeae Weske & Terborgh, 1971