A New Subspecies of the Fruit-Eating Bat, Sturnira Ludovici, from Western Mexico

In the early 1960s, mammalogist J. Knox Jones Jr. embarked on field studies across western Mexico, collecting specimens that would reveal a previously unrecognized form of life. This publication documents his discovery of Sturnira ludovici occidentalis, a new subspecies of the fruit-eating bat, based on twenty-three specimens gathered from rugged terrain between Sinaloa and Jalisco. Jones provides meticulous anatomical measurements, skull dimensions, dental formulas, pelage coloration, that distinguish his discovery from its relatives. He maps the geographical boundaries where this subspecies thrives, arguing that isolation in mountain valleys and coastal lowlands has driven subtle but significant divergence from eastern populations. The work exemplifies rigorous taxonomic science: patient fieldwork, careful comparison, and measured conclusions. For readers curious about how scientists actually build the tree of life, one branch at a time, this paper offers a window into the painstaking process of naming and classifying the living world.