Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Superclass Homotherma Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758 Subclass Ornithurae Haeckel, 1866 see Clade Ornithurae Haeckel 1866 [Gauthier 1986] {Chiappe 1991} 1 Superorder Ratitae (Merrem, 1813) 2 Superorder Carinatae Merrem, 1813