Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates 1 Class Mixini see Class Myxini (Jaekel, 1911) 2 Class Cephalaspidomorpha see Class Cephalaspidomorphi Moy-Thomas & Mile, 1971 3 Class Chondrichthyes Huxley, 1880 - cartilaginous fishes 5 Class Reptilia Linnaeus, 1758 - reptiles 6 Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758 7 Class Mammalia Linnaeus, 1758 - mammals