Vertebrata Cuvier, 1812 - vertebrates
Count: [f†f] 7c;100o;734f; ‡2o;8f; †2c;109o;819f;10g [22 Aug 2017]
   Gnathostomata
  Count: [f†f] 6c;98o;732f; ‡2o;8f; †2c;104o;782f;9g [22 Aug 2017]
     Teleostomi
    Count: [f†f] 5c;94o;691f; ‡2o;8f; †1c;82o;712f;7g [22 Aug 2017]
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
      Count: [f†f] 4c;54o;292f; ‡2o;8f; †56o;574f;3g [22 Aug 2017]
         Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
        Count: [f†f] 3c;51o;265f; ‡2o;8f; †48o;494f;3g [22 Aug 2017]
           Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
          Count: [f†f] 27o;98f; ‡2o;3f; †6o;37f [31 Jul 2017]
             Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
            Count: [f†f] 27o;98f; ‡2o;3f; †5o;36f [31 Jul 2017]
               Superorder †Odontognathae Wetmore, 1930 see Subclass Archaeornithes Gadow, 1893
              Count: [†f] †2o;4f [29 Jul 2017]
                 Order †Ichthyornithiformes Marsh, 1873 [monotypic]
                Count: [†f] †1f [29 Jul 2017]
                   Family †Ichthyornithidae Marsh, 1873
                  Count: -