Order Rodentia - Family Geomyidae 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 2 859 870 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Zygogeomys trichopus Merriam 1895 Zygogeomys trichopus Merriam 1895 , N. Amer. Fauna, 8: 196 . Type Locality: Mexico , Michoacan , Nahuatzen, 8,000 -8,500 ft. ( 2,438 -2,591 m ). Vernacular Names: Michoacan Pocket Gopher . Distribution: Known only from small areas in the general vicinity of Lago Pátzcuaro, NC Michoacan ( Mexico ). Conservation: IUCN – Endangered. Local temporal extirpation documented by Hafner and Barkley (1984) .