A Taxonomic Study of the Middle American Snake, Pituophis deppei

The author’s fieldwork in the rugged hills of Michoacán uncovers a surprising overlap of two previously thought‑separate subspecies of a Mexican rattlesnake. By visiting remote sites and gathering fresh specimens, the study expands the existing picture of the snake’s range and variation. Collaboration with major natural‑history collections across the United States provides access to dozens of historic samples, allowing a thorough comparison of museum holdings.

Through a careful historical review and detailed measurements of ventral and caudal scales, the monograph sorts out the subtle differences that define each subspecies. Color patterns and scale counts become the clues that reveal how these snakes are related, while an accompanying plate illustrates the specimens in striking detail. The result is a clear, data‑driven portrait of a complex group of snakes, offering listeners insight into the painstaking work of taxonomy and the living diversity of Middle America.