Records of Harvest Mice, Reithrodontomys, from Central America, with Description of a New Subspecies from Nicaragua

Field and museum records document harvest mice (Reithrodontomys) across Central America, reporting new locality records, reproductive data, and morphological variation; the authors describe a new Nicaraguan subspecies, provide diagnostic characters, cranial and external measurements, and comparisons with neighboring subspecies, and note range extensions for several taxa. Specimens collected by multiple field parties and loans from other institutions underpin analyses of pelage, skull structure, dentition, and seasonal variation. The study includes collection localities, measurement protocols in millimeters, and discussion of implications for taxonomy and geographic distribution within the genus.