Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Ornithurae Haeckel, 1866 see Clade Ornithurae Haeckel 1866 [Gauthier 1986] {Chiappe 1991}
     Infraclass Ratitae (Merrem, 1813) P. Brodkorb, 1963 see Parvclass Ratitae (Merrem, 1813)
       Order ‡Dinornithiformes Gadow, 1893 - moas
         1 Family ‡Emeidae Bonaparte, 1854 - emeid moas
         2 Family ‡Dinornithidae Owen, 1843 - dinornithid moas