Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Pygostylia Chatterjee 1997 [Chiappe 2001]
     Ornithothoraces Chiappe 1995
       †Enantiornithes Walker 1981 [Sereno 1998] see Infraclass Enantiornithes Walker, 1981
         †Longipterygidae Zhang, Zhou, Hou & Gu 2001 [O'Connor et al. 2009] see Family Longipterygidae Zhang, Zhou, Hou & Gu, 2001
           1 Genus †Longipteryx Zhang, Zhou, Hou & Gu, 2001
           2 Genus †Shanweiniao O'Connor et al., 2009
           3.1 Genus †Longirostravis Hou, Chiappe, Zhang & Chuong, 2004
           3.2 Genus †Rapaxavis Morschhauser et al., 2009