Subclass Avialae Gauthier, 1986 see Clade Avialae Gauthier 1986
Count: [o] 31o;113f; ‡2o;6f; †11o;14f
   Infraclass Aves Linnaeus, 1758 see Subclass Aves Linnaeus, 1758
  Count: [o] 31o;113f; ‡2o;6f; †11o;14f
     Parvclass †Palaeoaves Livezey & Zusi, 2007 see Class Aves Linnaeus, 1758
    Count: [†f] †4o;4f
       Superorder †Archaeornithes Gadow, 1893 see Class Aves Linnaeus, 1758
      Count: [†f] †2o;2f
         Order †Archaeopterygiformes Fürbringer, 1888
        Count: [†f] †1f
           1 Family †Archaeopterygidae Huxley, 1871
          Count: -