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 Penelopinae Bonaparte, 1831 - guans
             Genus Ortalis Merrem, 1786
               Ortalis ruficauda Jardine, 1847 - rufous-vented chachalaca
                 1 Ortalis ruficauda ruficrissa Sclater & Salvin, 1870 - rufous-vented chachalaca
                 2 Ortalis ruficauda ruficaudaᵀ Jardine, 1847 - rufous-tipped chachalaca