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 Procellariidae Leach, 1820 - petrels, shearwaters