Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
Count: -
   Subclass †Sauriurae Haeckel, 1866 see Subclass Archaeornithes Gadow, 1893
  Count: -
     Infraclass †Enantiornithes Walker, 1981
    Count: [†g] †2o;3f;19g;7s [21 Mar 2017]
       Order †Euornithiformes Kurochkin, 1996 [monotypic]
      Count: [†g] †1f;6g;5s [21 Mar 2017]
         Family †Concornithidae Kurochkin, 1996
        Count: [†g] †6g;5s [21 Mar 2017]
           Genus †Sinornis Sereno & Rao, 1992
          Count: -