Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass †Enantiornithes Walker, 1981 see Infraclass Enantiornithes Walker, 1981
     Order †Longirostravisiformes Zhou & Zhang, 2006 see Order Longipterygiformes Zhang, Zhou, Hou & Gu, 2001
       Family †Longirostravisidae Zhou & Zhang, 2006 see Clade Longipterygidae Zhang, Zhou, Hou & Gu 2001 [O'Connor et al. 2009]
         ?Genus †Otogornis Hou, 1994
           1 †Otogornis genghisi Hou, 1994