Order Didelphimorphia Author Alfred L. Gardner text 1993 Smithsonian Institution Press Washington and London Editor Don E. Wilson Editor DeeAnn M. Reeder Mammal Species of the World (2 nd Edition) 15 23 book chapter http://doi.org/10.5281/zenodo.7353070 1-56098-217-9 7353070 Marmosa canescens (J. A. Allen, 1893) . Bull. Amer. Mus. Nat. Hist., 5:235 . TYPE LOCALITY: México , Oaxaca , "Santo Domingo de Guzman, Isthmus of Tehuantepec." DISTRIBUTION: México from S Sonora to Oaxaca , Yucatân , and Très Marias Isis. SYNONYMS: gaumeri Osgood, 1913 ; insularis Merriam, 1908; oaxacae Merriam, 1897 ; sinaloae J. A. Allen, 1898 .