Monodelphis orinoci (Thomas, 1899) . Ann. Mag. Nat. Hist., ser. 7, 3:154.

TYPE LOCALITY: Venezuela, Bolivar, Caicara.

DISTRIBUTION: Orinoco Basin in S. Venezuela; W. Guyana; N. Brazil.

COMMENT: Formerly included in brevicaudata by Cabrera, 1958; separated by Reig et al., 1977, Biol. J. Linn. Soc., 9: 191 -216.