Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   1 Genus †Archaeopteryx Meyer, 1861
   2.1 Genus †Jeholornis Zhou & Zhang, 2002
   2.2.1 Genus †Zhongornis Gao et al., 2008
   2.2.2 Pygostylia Chatterjee 1997 [Chiappe 2001]