| | Brown Throated three-toed sloth |
 | | Aside from the fact that the two-toed sloth has two claws on its front limbs and the three-toed sloth has three, differences can be found in the number of vertebrae, their behavior, and their habits (Pocock 1924; Krumbiegel 1941). |
 | | The two-toed sloth, a close relative of the three-toed sloth is identified as part of the family Megalonychidae, which recognizes two species Cholepus hoffmanni (Peters 1859), and Choloepus didactylus (Linne 1758). |
 | | Three ancestral ground sloth families are said to have once existed; Megatheriidae the South American giant ground sloth whose ancestors were arboreal, and the Megalonychidae and Mylondontidae which were always terrestrial ground sloths. |
| bss.sfsu.edu /geog/bholzman/courses/fall99projects/sloth.htm (0 words) |