Megalonychidae, or two-toed sloths, are a family in the order Xenarthra. There is a single genus in the family and just two species, Choloepus didactylus and Choloepus hoffmanni.
General information and anatomy of the two toed sloth.
Information from Wikipedia on the classification of the family Megalonychidae which contains just two species, Choloepus didactylus and Choloepus hoffmanni.
The two extant species of two-toed sloths are Linnaeus's (Choloepus didactylus) and Hoffmann's two-toed sloth (Choloepus hoffmanni). They are the only members of the genus Choloepus and are the only living members of the family Megalonychidae.
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