A New Species of Pocket Gopher (genus Pappogeomys) from Jalisco, México

A concise taxonomic monograph describing a newly identified species of pocket gopher from the Sierra del Tigre mountains of Jalisco, México. Russell provides a meticulous morphological analysis, detailing the cranial and dental characteristics that distinguish Pappogeomys alcorni from its close relative Pappogeomys bulleri. Based on specimens collected primarily by Joseph R. Alcorn, the work establishes the diagnostic features that warrant specific rather than subspecific recognition. The text includes habitat information, comparative measurements, and careful argumentation for the species designation. This is a foundational paper in Neotropical mammalogy, the kind of slim, dense work that shifts how we understand biodiversity in western México. For mammalogists and rodent systematists, it represents the moment a new organism enters scientific knowledge.