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 Calomys callidus (Thomas, 1916) . Ann. Mag. Nat. Hist., ser. 8, 17:182 . TYPE LOCALITY: Argentina , Corrientes Prov. , Goya, 600 ft . DISTRIBUTION: EC Argentina and E Paraguay . COMMENTS: Diagnosed as a subspecies of C. venustus and recognized as such (e.g., Cabrera, 1961) until Hershkovitz (1962) placed it in synonymy with C. callosus callosus . Specific status of callidus affirmed by Corti et al. (1987) , who summarized its distribution and karyotypic discrimination.