Order Rodentia (Part 2) Author James H. Honacki Author Kenneth E. Kinman Author James W. Koeppl text 1982 Alien Press, Inc. & The Association of Systematics Collections Lawrence, Kansas, USA Editor James H. Honacki Editor Kenneth E. Kinman Editor James W. Koeppl Mammal Species of the World (1 st Edition) 382 392 book chapter 193494 10.5281/zenodo.7353025 16592775-0363-4466-953e-957ad3bb4333 0-89327-235-3 7353025 Thomomys umbrinus (Richardson, 1829) . Fauna Boreali-Americana, 1:202 . REVIEWED BY: J. Ramirez-Pulido (JRP). TYPE LOCALITY: Mexico , Veracruz (probably vicinity of Boca del Norte) . DISTRIBUTION: S.W. U.S. A, to Puebla and Veracruz ( Mexico ). COMMENT: Revised by Hoffmeister, 1969 , Mise. Publ. Univ. Kans. Mus. Nat. Hist., 51:75-91. Hall, 1981:469 , included baileyi , bottae, and townsendii in this species based on a réévaluation of data in Hoffmeister, 1969 , Thaeler, 1968, Evolution, 22:543-555, and reported intergradation (between umbrinus and bottae) in Nuevo Leon ( Mexico ). Hoffmeister, 1969 , considered bottae a distinct species; Thaeler, 1968, considered townsendii a distinct species. Further studies of these taxa are needed. ISIS NUMBER: 5301410003007009001.