Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Order Pilosa Flower, 1883 - sloths Suborder Folivora Delsuc, Catzeflis, Stanhope & Douzery, 2001 Family Bradypodidae Batsch, 1788 - three-toed tree sloths Genus Bradypus Linnaeus, 1758 - three-toed tree sloths Bradypus tridactylus Linnaeus, 1758 - pale-throated sloth