Abstract

AbstractSouthern California has experienced widespread amphibian declines since the 1960s. One species, the Vulnerable California red-legged frogRana draytonii, is now considered to be extirpated from most of southern California. In February 2017 a population ofR. draytoniiwas discovered in the southern foothills of the San Bernardino Mountains of Riverside County, California, near the edge of the species’ historical distribution. This population belongs to an mtDNA lineage that was presumed to be extirpated within the USA but is still extant in Baja California, Mexico. This discovery increases the potential for future, evolutionarily informed translocations within the southern portion of this species’ range in California.

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