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: -