Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
               Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
                 Order Struthioniformes Latham, 1790
                   Suborder Rheae Forbes, 1884
                     Family Rheidae Bonaparte, 1849 - rheas
                       Genus Rhea Brisson, 1760
                         Rhea americana (Linnaeus, 1758) - greater rhea
                           1 Rhea americana americanaᵀ (Linnaeus, 1758)
                           2 Rhea americana intermedia Rothschild & Chubb, 1914
                           3 Rhea americana albescens Lynch Arribálzaga & Holmberg, 1878
                           4 Rhea americana nobilis Brodkorb, 1939
                           5 Rhea americana araneipes Brodkorb, 1938