Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
               Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
                 Order Procellariiformes Fürbringer, 1888
                   Family Procellariidae Leach, 1820 - petrels, shearwaters
                     Subfamily Pterodrominae see Subfamily Procellariinae Vigors, 1825
                       1 Genus Bulweria Bonaparte, 1843
                       2 Genus Pterodroma Bonaparte, 1856
                       3 Genus Halobaena Bonaparte, 1856