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 Pelecanidae Rafinesque, 1815 - pelicans
           Genus Pelecanus Linnaeus, 1758
             Pelecanus occidentalis Linnaeus, 1766 - brown pelican
               1 Pelecanus occidentalis occidentalis Linnaeus, 1766
               2 Pelecanus occidentalis carolinensis Gmelin, 1789
               3 Pelecanus occidentalis californicus Ridgway, 1884
               4 Pelecanus occidentalis murphyi Wetmore, 1945
               5 Pelecanus occidentalis urinator Wetmore, 1945
               6 Pelecanus occidentalis thagus Molina, 1782