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] Pelecaniformes Sharpe, 1891
         Family Phalacrocoracidae Reichenbach, 1850 [monotypic] - cormorants
           Genus Phalacrocorax Brisson, 1760
             Phalacrocorax atriceps King, 1828 - imperial shag
               1 Phalacrocorax atriceps atriceps King, 1828
               2 Phalacrocorax atriceps nivalis Falla, 1937
               3 Phalacrocorax atriceps georgianus Lönnberg, 1906