A New Pocket Gopher (Genus Thomomys), from Eastern Colorado

"A New Pocket Gopher (Genus Thomomys), from Eastern Colorado" by E. Raymond Hall is a scientific report that carefully looks at different groups of pocket gophers. It focuses on gophers from east-central Colorado that were previously classified incorrectly. The author's purpose is to propose a new subgroup of these animals. In his research, Hall gives a very close description of a new kind of pocket gopher, calling it "Thomomys talpoides retrorsus," which he found living in eastern Colorado. He separates this group from others that were similarly classified, providing a complete comparison involving skull sizes, colors, and other physical characteristics. The study fixes past mistakes in classification and also improves our understanding of the different types of mammals that live in North America.