Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass †Enantiornithes Walker, 1981 see Infraclass Enantiornithes Walker, 1981
     Order †Longipterygithiformes nom. null. see Order Longipterygiformes Zhang, Zhou, Hou & Gu, 2001
       Family †Longipterygithidae Zhou & Zhang, 2006 see Clade Longipterygidae Zhang, Zhou, Hou & Gu 2001 [O'Connor et al. 2009]
         Genus †Longipteryx Zhang, Zhou, Hou & Gu, 2001
           1 †Longipteryx chaoyangensis F. Zhang et al., 2001