Family: Bradypodidae - General information and anatomy of the three toed sloth. animaldiversity.ummz.umich.edu/chordata/mammalia/xenarthra/bradypodidae.html
Family: Megalonychidae - General information and anatomy of the two toed sloth. animaldiversity.ummz.umich.edu/chordata/mammalia/xenarthra/megalonychidae.html
