Order Rodentia - Family Cricetidae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 955 1189 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Reithrodontomys (Reithrodontomys) zacatecae Merriam 1901 Reithrodontomys (Reithrodontomys) zacatecae Merriam 1901 , Proc. Wash. Acad. Sci., 3: 557 . Type Locality: México , Zacatecas , Sierra de Valparaíso. Vernacular Names: Zacatecan Harvest Mouse . Synonyms: Reithrodontomys (Reithrodontomys) obscurus Merriam 1901 . Distribution: W Chihuahua to WC Michoacán , México . Conservation: IUCN – Lower Risk (nt). Discussion: Subgenus Reithrodontomys , megalotis species group. Hooper (1952) noted the phenetic distinction of zacatecae from R. megalotis saturatus in Jalisco and Michoacán but elected to retain it as a subspecies. Karyotypic divergence of zacatecae reported by Hood et al. (1984), who proposed its elevation to species; status sustained by genetic distance levels, as sister species to R. megalotis ( Bell et al., 2001 ) . Distributional limits, morphological discrimination, and assignment of species-group synonyms deserve amplification.