[Avialae] Gauthier 1986
Count: -
   Aves Linnaeus 1758 [Gauthier 1986], nom. cl. inval. see Subclass Aves Linnaeus, 1758
  Count: -
     Pygostylia Chatterjee 1997 [Chiappe 2001]
    Count: -
       Ornithothoraces Chiappe 1995
      Count: -
         Ornithuromorpha Chiappe 2001
        Count: -
           Genus †Patagopteryx Alvarenga & Bonaparte, 1992
          Count: -