Subspecies and Distribution. P.d.difficilisJ.A.Allen,1891—fromSWChihuahuaSEtoGuanajuatoandN&WQuerétaro,Mexico. P.d.amplusOsgood,1904—SHidalgo,extremeWVeracruz,NMéxico,Puebla,andNWOaxaca,Mexico. P.d.felipensisMerriam,1898—C&SMéxico,DistritoFederal,extremeWPuebla,andCOaxaca,Mexico. P.d.petricolaHoffmeister&delaTorre,1959—extremeSECoahuila,SNuevoLeon,NEZacatecas,NSanLuisPotosi,andextremeSWTamaulipas,Mexico. P. d. saxicola Hoffmeister & de la Torre, 1959 — restricted to E Querétaro and N Hidalgo, Mexico. in Cricetidae

Subspecies and Distribution. P.d.difficilisJ.A.Allen,1891—fromSWChihuahuaSEtoGuanajuatoandN&WQuerétaro,Mexico. P.d.amplusOsgood,1904—SHidalgo,extremeWVeracruz,NMéxico,Puebla,andNWOaxaca,Mexico. P.d.felipensisMerriam,1898—C&SMéxico,DistritoFederal,extremeWPuebla,andCOaxaca,Mexico. P.d.petricolaHoffmeister&delaTorre,1959—extremeSECoahuila,SNuevoLeon,NEZacatecas,NSanLuisPotosi,andextremeSWTamaulipas,Mexico. P. d. saxicola Hoffmeister & de la Torre, 1959 — restricted to E Querétaro and N Hidalgo, Mexico.Published as part of Don E. Wilson, Russell A. Mittermeier & Thomas E. Lacher, Jr, 2017, Cricetidae, pp. 204-535 in Handbook of the Mammals of the World – Volume 7 Rodents II, Barcelona :Lynx Edicions on page 396, DOI: 10.5281/zenodo.670714