Subclass Avialae Gauthier, 1986 see Clade Avialae Gauthier 1986
   Infraclass Aves Linnaeus, 1758 see Subclass Aves Linnaeus, 1758
     Parvclass †Palaeoaves Livezey & Zusi, 2007 see Class Aves Linnaeus, 1758
       Superorder †Archaeornithes Gadow, 1893 see Class Aves Linnaeus, 1758
         1 Order †Archaeopterygiformes Fürbringer, 1888
         2 Order †Confuciusornithiformes Hou, Zhou, Gu & Zhang, 1995