Kingdom Animalia Linnaeus, 1758 - animals
Phylum Craniata Linnaeus, 1758
see Subphylum Vertebrata Cuvier, 1812
Class Mammalia Linnaeus, 1758 - mammals
Subclass Theria Parker & Haswell, 1897
Infraclass Placentalia Owen, 1837
see Cohort Placentalia Owen, 1837
Order Pilosa Flower, 1883 - sloths
Suborder Folivora Delsuc, Catzeflis, Stanhope & Douzery, 2001
1 Family Bradypodidae Batsch, 1788 - three-toed tree sloths
2 Family Megalonychidae Gervais, 1855 - West Indian sloths and two-toed tree sloths