Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Podicipediformes Fürbringer, 1888 [monotypic]
         Family Podicipedidae Bonaparte, 1832 - grebes
           1 Genus Tachybaptus Reichenbach, 1853
           2 Genus Podilymbus Lesson, 1831
           3 Genus Rollandia Bonaparte, 1856
           4 Genus Poliocephalus Selby, 1840
           5 Genus Podiceps Latham, 1787
           6 Genus Aechmophorus Coues, 1862