Proechimys brevicauda (Gunther, 1877) . Proc. Zool. Soc. Lond., 1876:748.

TYPE LOCALITY: Peru, Loreto, Rio Huallaga, Chamicuros .

DISTRIBUTION: E. Peru; N.W. Brazil.

COMMENT: Formerly included in longicaudatus; see Reig et al., 1980:291-312, in Voronstov and Van Brink, eds., Animal genetics and evolution, Junk, The Hague, and Patton and Gardner, 1972, Occas. Pap. Mus. Zool. La. St. Univ., 44.