Order Rodentia - Family Muridae Author Guy G. Musser Author Michael D. Carleton text 1993 Smithsonian Institution Press Washington and London Editor Don E. Wilson Editor DeeAnn M. Reeder Mammal Species of the World (2 nd Edition) 501 755 book chapter http://doi.org/10.5281/zenodo.7353098 1-56098-217-9 7353098 Zygodontomys J. A. Allen, 1897 . Bull. Am. Mus. Nat. Hist., 9:38 . TYPE SPECIES: Oryzomys cherriei J. A. Allen, 1895 (= Oryzomys brevicauda J. A. Allen and Chapman, 1893 ). COMMENTS: First revised by Hershkovitz (1962) , then thought to include southern populations now allocated to Bolomys lasiurus (see Maia and Langguth, 1981 ; Reig, 1987; Voss and Linzey, 1981 ). Definition of genus emended and species taxonomy revised by Voss (1991a) ; Reig (in Reig et al., 1990a ) listed four species as valid. Karyology summarized by Gardner and Patton (1976) and Reig et al. (1990a) . Hershkovitz (1962) considered Zygodontomys a member of the phyllotine group, an association disputed by other studies ( Hooper and Musser, 1964a ; Olds and Anderson, 1989 ; Pearson and Patton, 1976 ). Unsettled phylogenetic position expressed as Sigmodontinae incertae sedis ( Reig, 1984 ; Voss, 1991a ).