Order Anseriformes Wagler, 1831 - waterfowl and screamers
   Suborder Anseres Linnaeus, 1758 - waterfowl
     Family Anatidae Vigors, 1825 - ducks, geese, swans
       Subfamily Plectropterinae G.R. Gray - spur-winged geese see Subfamily Tadorninae Reichenbach
         1 Genus †Teleornis Ameghino, 1899
         2 Genus †Loxornis Ameghino, 1895
         3 Genus Neochen Oberholser, 1918
         4 Genus Alopochen Stejneger, 1885
         5 Genus ‡Euryanas Oliver, 1930
         6 Genus ‡Geochen Wetmore, 1943
         7 Genus ‡Centrornis Andrews, 1897