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

A meticulous taxonomic investigation into the harvest mice of Central America, this monograph represents the kind of careful, specimen-driven science that builds the foundations of our biological knowledge. Sydney Anderson and J. Knox Jones methodically document specimens collected across multiple Central American locales, presenting exhaustive measurements, cranial analyses, and comparative data that distinguish one population from another. The heart of the work lies in the formal description of Reithrodontomys fulvescens meridionalis, a new subspecies from Nicaragua, distinguished by subtle but consistent variations in pelage coloration and cranial morphology from its northern relatives. The authors situate their findings within the broader context of rodent biogeography, arguing that the distributions of these small mammals reveal patterns of climatic and ecological change across the region. For mammalogists and conservation biologists, this work offers an indispensable reference: a precisely argued case for how we define and differentiate populations, grounded not in speculation but in the physical evidence of hundreds of specimens. It is science in its most disciplined form, the careful architecture of taxonomic knowledge upon which all broader ecological understanding depends.