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 Pachyptilinae Oliver, 1930 see Subfamily Procellariinae Vigors, 1825
                       Genus Pachyptila Illiger, 1811
                         1 Pachyptila vittata (Forster, 1777) - broad-billed prion
                         2 Pachyptila turtur (Kuhl, 1820) - fairy prion
                         3 Pachyptila crassirostris (Mathews, 1912) - fulmar-prion
                         4 Pachyptila belcheri (Mathews, 1912) - slender-billed prion
                         5 Pachyptila desolata (Gmelin, 1789) - Antarctic prion
                         6 Pachyptila salvini (Mathews, 1912) - Salvin's prion