Order Ralliformes Reichenbach, 1854 - marsh birds and allies
   Suborder Cariamae (Wagler, 1830) Fürbringer, 1888 - seriemas and allies
     Family Cariamidae Bonaparte, 1853 - seriemas
       Subfamily †Psilopterinae Dolgopol de Saez
         1 Genus †Riacama Ameghino, 1899
         2 Genus †Smiliornis Ameghino, 1899
         3 Genus †Pseudolarus Ameghino, 1891
         4 Genus †Psilopterus Moreno & Mercerat, 1891
         5 Genus †Lophiornis Ameghino, 1891
         6 Genus †Procariama Rovereto, 1914