The Baculum in the Chipmunks of Western North America

"The Baculum in the Chipmunks of Western North America" by John A. White is a study that examines the bone structure in male chipmunks to understand how different chipmunk species are related. The paper carefully looks at the bone shapes in chipmunks from the "Neotamias" group, showing detailed drawings and measurements. By comparing these bones across different chipmunk types in Western North America, the study suggests that this bone can help scientists classify chipmunks and discover how they evolved and adapted to their environments. The work connects these bone differences to how scientists already sort chipmunks based on things like skull shape and fur patterns, highlighting the importance of this hidden bone as a key to understanding chipmunk history.