Two of the Little Dell Dam fossil localities produced the 1st Pleistocene records of the jumping mouse Zapus from Utah. We describe these teeth in detail and compare their morphology with both extinct and extant jumping mouse taxa. Although it is not possible to confidently assign these specimens to a particular species, the Little Dell Dam fossils are clearly distinct from the only living jumping mouse (Zapus princeps) currently known from Utah. The paracone is attached to the rest of the occlusal surface of the upper 1st and 2nd molars in modern Z. princeps from Utah; the paracone is isolated in the molars from Little Dell Dam. The fossils from Little Dell Dam are the 1st reported records of Pleistocene Zapus west of the Rocky Mountains.
On page 443, under Acknowledgments, the copy reads: “We thank our 2 reviewers, J. Mead and S. Lucas, for their comments and suggestions, and the Utah Geology Foundation for financial support.” The sentence should read: “We thank our 2 reviewers, J. Mead and S. Lucas, for their comments and suggestions, and the University of Texas (UT) Geology Foundation for financial support.” Also, the running heads in this article should have read WESTERN NORTH AMERICAN NATURALIST on the left-hand pages and FIRST PLEISTOCENE ZAPUS FROM UTAH on the right-hand pages.
Erratum notice here: wnan/vol65/iss1/21
Ruez, Dennis R. Jr. and Bell, Christopher J.
"First Pleistocene jumping mouse (Zapus, Zapodinae, Rodentia) from Utah,"
Western North American Naturalist: Vol. 64:
4, Article 3.
Available at: https://scholarsarchive.byu.edu/wnan/vol64/iss4/3