Order Rodentia - Suborder Hystricognathi Author Charles A. Woods text 1993 Smithsonian Institution Press Washington and London Editor Don E. Wilson Editor DeeAnn M. Reeder Mammal Species of the World (2 nd Edition) 771 806 book chapter http://doi.org/10.5281/zenodo.7353083 1-56098-217-9 7353083 Proechimys decumanus (Thomas, 1899) . Ann. Mag. Nat. Hist., ser. 7, 4:282 . TYPE LOCALITY: Ecuador , Prov. de Guayas , Changón . DISTRIBUTION: NW Peru , SW Ecuador , Pacific lowlands. COMMENTS: Subgenus Proechimys . Listed as a subspecies of cayennensis (= guyannensis) by Cabrera (1961:520), but as a species by Corbet and Hill (1991:205) , Nowak (1991:943) and Emmons and Feer (1990) .