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] Charadriiformes Huxley, 1867 - shorebirds, gulls, auks
         Family Alcidae Vigors, 1825 - auks
           01 Genus Alle Link, 1806 [monotypic]
           02 Genus Uria Brisson, 1760
           03 Genus Alca Linnaeus, 1758 [monotypic]
           04 Genus ‡Pinguinus Bonnaterre, 1791 [monotypic]
           05 Genus Cepphus Pallas, 1769
           06 Genus Brachyramphus Brandt, 1837
           07 Genus Synthliboramphus Brandt, 1837
           08 Genus Ptychoramphus Brandt, 1837 [monotypic]
           09 Genus Aethia Merrem, 1788
           10 Genus Cerorhinca Bonaparte, 1828 [monotypic]
           11 Genus Fratercula Brisson, 1760