Choloepus didactylus (Linnaeus, 1758) . Syst. Nat., 10th ed., 1:35.

TYPE LOCALITY: Surinam .

DISTRIBUTION: Guianas; Delta of Rio Orinoco and south of Rio Orinoco (Venezuela); south to Maranhao on east, and west along both banks of Rio Amazonas (Brazil) to Amazon Basin of Colombia, Ecuador and Peru.

COMMENT: Reviewed by Wetzel and Avila-Pires, 1980, Rev. Brasil. BioL, 40:834. Type locality restricted by Thomas, 1911, Proc. Zool. Soc. Lond., 1911: 132.

ISIS NUMBER: 5301407002002001001.