[Avialae] Gauthier 1986 Count: - Aves Linnaeus 1758 [Gauthier 1986], nom. cl. inval. see Subclass Aves Linnaeus, 1758 Count: - Pygostylia Chatterjee 1997 [Chiappe 2001] Count: - Ornithothoraces Chiappe 1995 Count: - Ornithuromorpha Chiappe 2001 Count: - Genus †Patagopteryx Alvarenga & Bonaparte, 1992 Count: -