Subclass Avialae Gauthier, 1986 see Clade Avialae Gauthier 1986
   Infraclass Aves Linnaeus, 1758 see Subclass Aves Linnaeus, 1758
     Parvclass †Ornithurae Haeckel, 1866 see Clade Ornithurae Haeckel 1866 [Gauthier 1986] {Chiappe 1991}
       1 Superorder †Odontoholomorphae Stejneger, 1885 see Clade Ornithurae Haeckel 1866 [Gauthier 1986] {Chiappe 1991}