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 Genus †Rapaxavis Morschhauser et al., 2009