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 Isothrix pagurus Wagner, 1845 . Arch. Naturgesch., 1:146 . TYPE LOCALITY: Brazil , Amazonas, Borba, Lower Rio Madeira . DISTRIBUTION: Amazon Basin of Central Brazil from Rio Madeira east to Rio Tapajoz and north to lower Rio Negro. STATUS: Uncommon. SYNONYMS: crassicaudus.