Phylum Chordata Bateson, 1885 - chordates
   Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
     Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
       Superorder Neognathae Pycraft, 1900 see Cohort Neognathae Pycraft, 1900
         Order Procellariiformes Fürbringer, 1888
           Family Hydrobatidae Mathews, 1912 - storm petrels see Family Oceanitidae Forbes, 1882
             1 Genus Oceanites Keyserling & Blasius, 1840
             2 Genus Garrodia Forbes, 1881
             3 Genus Pelagodroma Reichenbach, 1853
             4 Genus Fregetta Bonaparte, 1855
             5 Genus Nesofregetta Mathews, 1912
             6 Genus Hydrobates Boie, 1822
             7 Genus Halocyptena Coues, 1864 see Genus Oceanodroma Reichenbach, 1853
             8 Genus Oceanodroma Reichenbach, 1853