A recent paper in Zootaxa (Brown & Twomey 2009) describes three new species of Ameerega from Peru. Two of these species (A. ignipedis and A. yoshina) were discovered in the Serrania de Contamana, a poorly explored mountain range that is disjunct from the Andean foothills.
Brown, J. L., & Twomey, E. (2009). Complicated histories: three new species of poison frogs of the genus Ameerega (Anura: Dendrobatidae) from north-central Peru. Zootaxa, 2049, 1-38.