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 1 Superorder †Archaeornithes Gadow, 1893 see Class Aves Linnaeus, 1758 2 Superorder †Euenantiornithes Chiappe, 2002