New Research Describes Two Distinct Species of Desert Tortoise
It has been 150 years since scientists officially described the desert tortoise as a species. However, new research published this month indicates that we have actually been sharing the desert with at least two genetically distinct species of the desert tortoise. Historically, many biologists and wildlife officials assumed the desert tortoise constituted a single species spanning the Mojave and Sonoran deserts in the US and Mexico. The new research describes genetic, behavioral and physical differences that distinguish the two species of desert tortoise. According to the research by Robert W. Murphy and Kristin H. Berry, among other scientists, the population of desert tortoise east of the Colorado River ( Gopherus morafkai ) is genetically distinct from the population to the west ( Gopherus agassizii ) . Distribution of the desert tortoises aligned with Gopherus agassizii . The light gray depicts the range of the "Sonoran" population of the tortoise ...