Subclass Avialae Gauthier, 1986 see Clade Avialae Gauthier 1986
   Infraclass Aves Linnaeus, 1758 see Subclass Aves Linnaeus, 1758
     Parvclass †Palaeoaves Livezey & Zusi, 2007 see Class Aves Linnaeus, 1758
       Superorder †Euenantiornithes Chiappe, 2002
         Order †Apsaraviformes Livezey & Zusi, 2007
           1 Family †Apsaravidae Livezey & Zusi, 2007