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 †Alexornithiformes Brodkorb, 1976
Count: [†g] †2f;13g;2s [21 Mar 2017]
Family †Alexornithidae Brodkorb, 1976
Count: [†g] †8g;2s [21 Mar 2017]
1 Genus †Alexornis Brodkorb, 1976 [monotypic]
Count: [†*] †1s [21 Mar 2017]
2 Genus †Kizylkumavis Nessov, 1984
Count: -
3 Genus †Sazavis Nessov & Yarkov, 1989 [monotypic]
Count: [†*] †1s [21 Mar 2017]
4 Genus †Nanantius Molnar, 1986
Count: [†*] †2s [21 Mar 2017]
5 Genus †Gobipteryx Elżanowski, 1974 [monotypic]
Count: [†*] †1s [21 Mar 2017]
6 Genus †Neuquenornis Chiappe & Calvo, 1994
Count: -
7 Genus †Zhyraornis Nessov, 1984
Count: †1s
8 Genus †Lenesornis Kurochkin, 1996 [monotypic]
Count: [†*] †1s [21 Mar 2017]