Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
       Order Procellariiformes Fürbringer, 1888
         Family Diomedeidae Gray, 1840 - albatrosses
         Family Hydrobatidae Mathews, 1912 - storm petrels see Family Oceanitidae Forbes, 1882
         Family Pelecanoididae Gray, 1871 - diving petrels
         Family Procellariidae Leach, 1820 - petrels, shearwaters