Oecomys roberti (Thomas, 1904) . Proc. Zool. Soc. Lond., 1903(2):237 [1904].

TYPE LOCALITY: Brazil, Mato Grosso, Santa Anna de Chapada, 800 m .

DISTRIBUTION: S Venezuela, Guianas, and Amazonian region of N Brazil, E Peru, and N Bolivia.

SYNONYMS: guianae, tapajinus.