Bradypus tridactylus Linnaeus, 1758 . Syst. Nat., 10th ed., 1:34.

TYPE LOCALITY: "Americae meridionalis arboribus;" restricted to Surinam by Thomas (1911a) .

DISTRIBUTION: Guyana, Surinam, French Guiana, Venezuela south of the Orinoco, and N Brazil (south to the southern bank of the Amazonas/Solimöes).

SYNONYMS: ai Lesson, 1827; blainvillii Gray, 1850; cummunis Lesson, 1841; flaccidus Gray, 1850; cuculliger Wagler, 1831; gularis Riippell, 1842 .