Four New Pocket Gophers of the Genus Cratogeomys from Jalisco, Mexico

In this concise study the author journeys into the highlands of central Jalisco, where surprisingly diverse populations of pocket gophers have long eluded researchers. Drawing on specimens gathered by field assistant J.R. Alcorn and supported by the National Science Foundation, the work defines the subtle yet important differences among several local forms. The narrative explains why these burrowing mammals are notoriously hard to catch, and it details the careful measurements and color observations that set the stage for a deeper taxonomic analysis.

The paper introduces two previously unknown subspecies of Cratogeomys gymnurus and two of Cratogeomys zinseri, each distinguished by variations in size, skull shape, fur hue, and dental structure. Through side‑by‑side comparisons with known relatives, the author shows how even modest changes can signal distinct evolutionary paths. Readers gain a clear picture of the meticulous detective work behind species classification and a fresh appreciation for the hidden biodiversity of Mexico’s central valleys.