North American Jumping Mice (Genus Zapus)

A comprehensive taxonomic revision of the genus Zapus examines geographic distribution, paleontology, and species-level relationships across North America. Based on about 3,600 specimens and extensive measurements, it provides an annotated chronology of names, diagnostic characters, an artificial key, and systematic accounts for named species and subspecies (including treatment of trinotatus, princeps, and hudsonius). The work evaluates taxonomically useful morphological characters, documents nongeographic variation, compares related genera, and supplies tables, figures, and synonymies to facilitate identification and clarify subspecific limits.