This species is known only from three localities in the Upper Río Pastaza Valley in the vicinity of Yungilla and Mount Tungurahua, near Baños, in Tungurahua Province, Ecuador. Its altitudinal range is 1,800-1,840m asl. Additional survey work may reveal that the species occurs more widely than current records suggest.
Habitat and Ecology
It is known only from altered, degraded montane forest, with some exotic trees. Its apparent rarity might be related to it possibly having a strong preference for pristine habitats, where it could prove to be more common. Breeding is believed to by direct development, but the site of egg deposition is not known.
It has always been a rare species.
The major threat is habitat loss and degradation due to agricultural development, rearing of livestock, logging, and human settlement.
It is not known from any protected areas, though it is possible it may occur in Parque Nacional Sangay. Further survey work is required to better understand the range and ecology of this species.
John Lynch, Luis A. Coloma, Santiago Ron 2004. Pristimantis pastazensis. In: IUCN 2014