Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758 Pygostylia Chatterjee 1997 [Chiappe 2001] [Family] †Confuciusornithidae Hou, Zhou, Gu & Zhang, 1995 Genus †Changchengornis Ji, Chiappe & Ji, 1999