Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758 Order Pelecaniformes Sharpe, 1891 Family Pelecanidae Rafinesque, 1815 - pelicans