| Bradypus (Drievingerige luiaards): | Bradypus crinitus ·Escudo-eilandluiaard (B. pygmaeus) · Kraagluiaard (B. torquatus) · Drievingerige luiaard (B. tridactylus) · Kapucijnluiaard (B. variegatus) |
| Choloepus (Tweevingerige luiaards): | Tweevingerige luiaard (C. didactylus) · Hoffmannluiaard (C. hoffmanni) |