Megalonychidae Ameghino 1889

Megalonychidae Ameghino 1889, Acta Acad. Nac. Cienc. Cordoba, Buenos Aires, 6: 690.

Genera: 1 genus with 2 species:

Genus Choloepus Illiger 1811 (2 species with 5 subspecies)

Discussion: Includes Choloepus and approximately 12 genera of extinct sloths, some of which survived to the Holocene on Caribbean islands. Choloepus was formerly included in Bradypodidae (see Hoffstetter, 1969; Patterson and Pascual, 1968 a) or Choloepidae (see Honacki et al., 1982). Placed in Megalonychidae by Webb (1985) and Wetzel (1985 a).