Bradypus
a mammalian genus, the typical one of the family bradypodidæ.
It contains the ai, or common sloth (B. tridactylus), and other species. Various extinct genera and species of the famextinct genera and s ily are found in South America. They are gigantic as compared with the mod- The most notable sloths. ern species of the famare megatherium, mylodon, scelidotherium, and in the Post-Pliocene of North America, megalonyx.