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
         1 †Longipterygidae Zhang, Zhou, Hou & Gu 2001 [O'Connor et al. 2009] see Family Longipterygidae Zhang, Zhou, Hou & Gu, 2001
         2.1 Genus †Concornis Sanz & Buscalioni, 1992
         2.2.1 Genus †Eoenantiornis L. Hou et al., 1999
         2.2.2.1 Genus †Eoalulavis Sanz et al., 1996
         2.2.2.2.1 Genus †Iberomesornis Sanz & Bonaparte, 1992
         2.2.2.2.2 Genus †Neuquenornis Chiappe & Calvo, 1994
         2.2.2.2.3 Genus †Gobipteryx Elżanowski, 1974
         2.2.2.2.4 Genus †Vescornis Zhang et al., 2004