Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Ornithurae Haeckel, 1866 see Clade Ornithurae Haeckel 1866 [Gauthier 1986] {Chiappe 1991}
     Infraclass Carinatae Merrem, 1813 see Clade Carinatae Merrem 1813 [Gauthier & de Queiroz 2001]
       Order Ardeiformes Wagler, 1830
         Suborder Ciconiae Bonaparte, 1854
           Family Ciconiidae Sundevall, 1836 - storks
             Subfamily Ciconiinae Gray see Family Ciconiidae Sundevall, 1836
               01 Genus †Pelargopappus Stejneger, 1885
               02 Genus †Propelargus Lydekker, 1891
               03 Genus †Palaeoephippiorhynchus Lambrecht, 1930
               04 Genus †Ciconiopsis Ameghino, 1899
               05 Genus †Amphipelargus Lydekker, 1891
               06 Genus Leptoptilos Lesson, 1831
               07 Genus Ciconia Brisson, 1760
               08 Genus †Pelargosteon Kretzoi, 1962
               09 Genus †Prociconia Ameghino, 1891
               10 Genus †Palaeopelargus De Vis, 1892
               11 Genus †Xenorhynchopsis De Vis, 1905
               12 Genus Xenorhynchus Bonaparte, 1855 see Genus Ephippiorhynchus Bonaparte, 1855