Despite the relatively small distance of this new record from the town of Puruchuco—the closest known population (Icochea and Cossios, 2006)—we consider this new record to be a distinct population because there are effective barriers (runways, buildings, etc.) that likely prevent individuals from dispersing between the localities. Documenting this new population is important because of the few known remaining populations of P. sentosus and the serious threats that this species faces.Asociación Herpetológica Argentin