Family Megalonychidae
This family regroups all two-toed sloth species.

Choloepus didactylus – Linné’s two-toed sloth
Choloepus hoffmanni florenciae – Hoffmann’s two-toed sloth
Choloepus hoffmanni hoffmanni – Hoffmann’s two-toed sloth

Family Bradypodidae
This family regroups all three-toed sloth species.

Bradypus variegatus – Brown-throated sloth