Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass †Enantiornithes Walker, 1981 see Infraclass Enantiornithes Walker, 1981
     Order †Cathayornithiformes Zhou, Jin & Zhang, 1992
       Family †Cathayornithidae Zhou, Jin & Zhang, 1992
         Genus †Sinornis Sereno & Rao, 1992
           1 †Sinornis santensis Sereno & Rao, 1992