Proechimys simonsi Thomas, 1900 . Ann. Mag. Nat. Hist., ser. 7, 6:300.

TYPE LOCALITY: Peru, Dept. Junin, Rio Perené (240 m) .

DISTRIBUTION: E Ecuador, NE Peru, S Colombia.

COMMENTS: Subgenus Proechimys . Includes hendeei in Corbet and Hill (1991:206) and Eisenberg (1989:403). The chromosome no. is 2n=32; FN=44.