Proechimys warreni Thomas, 1905 . Ann. Mag. Nat. Hist., ser. 7, 16:312 -313.

TYPE LOCALITY: Guiana, 129 km up the Demerara River, Comackka .

DISTRIBUTION: Guiana, Suriname, exact limits not known.

COMMENTS: Subgenus Proechimys . Considered a distinct species by Husson (1978:436); a subspecies of cayennensis (= guyannensis) by Cabrera (1961:520).