Phylum Chordata Bateson, 1885 - chordates
   Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
     Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
       Superorder Palaeognathae Pycraft, 1900 see Cohort Palaeognathae Pycraft, 1900
         1 Order Struthioniformes Latham, 1790
         2 Order Rheiformes Forbes, 1884 see Suborder Rheae Forbes, 1884
         3 Order Casuariiformes Sclater, 1880
         4.1 Order Apterygiformes Haeckel, 1866
         4.2 Order ‡Dinornithiformes Gadow, 1893 - moas
         5 Order Tinamiformes Huxley, 1872