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 J. A. Allen, 1899 . Bull. Am. Mus . Nat. Hist., 12:257 . TYPE SPECIES: Echimys trinitatis J. A. Allen and Chapman, 1893 . SYNONYMS: Trinomys . COMMENTS: Traditionally divided into 2 subgenera ( Proechimys with 9 species groups distributed in most areas of tropical South America, and Trinomys with four species distributed in Eastern Brazil ). This group is very complex with many species and subspecies. Reviewed, in part, by Reig et al. (1980:291-312) , Gardner and Emmons (1984) , and Patton (1987) . May include Hoplomys (see Patton and Reig, 1989 ). The specific level taxonomy of the group is controversial, and is in need of a major revision. Most of the named forms in Corbet and Hill (1991) and Nowak (1991) are used here pending a revision of the group.