Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Order †Sapeornithiformes Zhou & Zhang, 2006
     Family †Sapeornithidae Zhou & Zhang, 2006
       Genus †Sapeornis Zhou & Zhang, 2002
         1 †Sapeornis chaoyangensis Zhou & Zhang, 2002