Bradypodidae, Gray, 1821

Voss, Robert S. & Fleck, David W., 2017, Mammalian Diversity And Matses Ethnomammalogy In Amazonian Peru Part 2: Xenarthra, Carnivora, Perissodactyla, Artiodactyla, And Sirenia, Bulletin of the American Museum of Natural History 2017 (417), pp. 1-1 : 1-

Sloths ( Bradypodidae and Megalonychidae )

The taxonomy of Recent sloths remains unrevised, and the current application of names is based on decades-old conventions that are now being challenged by molecular analyses. Morphological examination of available specimens from the Yavarí-Ucayali interfluve suggest that only a single species each of Bradypus (threetoed sloths, Bradypodidae ) and Choloepus (twotoed sloths, Megalonychidae ) occur here, although a second species of Choloepus might also be expected.