Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass †Enantiornithes Walker, 1981 see Infraclass Enantiornithes Walker, 1981
     Order †Protopterygiformes Zhou & Zhang, 2006
       Family †Protopterygidae Zhou & Zhang, 2006
         1 Genus †Protopteryx Zhang & Zhou, 2000
         2 ?Genus †Jibeinia Hou, 2000
         3 ?Genus †Vescornis Zhang et al., 2004