Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   01 Order †Jeholornithiformes Zhou & Zhang, 2006
   02 Order †Sapeornithiformes Zhou & Zhang, 2006
   03 Order †Confuciusornithiformes Hou, Zhou, Gu & Zhang, 1995
   04 Subclass †Enantiornithes Walker, 1981 see Infraclass Enantiornithes Walker, 1981
   05 Subclass Ornithurae Haeckel, 1866 see Clade Ornithurae Haeckel 1866 [Gauthier 1986] {Chiappe 1991}