Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Class Mammalia Linnaeus, 1758 - mammals Order Edentata Vicq-d'Azyr, 1792 see Order Xenarthra Cope, 1889 Family Bradypodidae Batsch, 1788 - three-toed tree sloths