This species is known only from the type locality, San Vicente, 3km west of Limon in the Cordillera Oriental, Azuay Province, southern Ecuador, at an altitude of 2,987m asl.
Habitat and Ecology
It occurs in cloud forest. Its reproductive mode and its tolerance of habitat disturbance are unknown, but the larvae are likely to develop in water.
It is probably known only from the type series of five specimens collected in 1962. Subsequent survey efforts for this species have been insufficient, but other members of this genus in ecologically similar areas in Ecuador have disappeared or declined.
This species is threatened by habitat destruction and degradation due to agricultural development and logging, and also by invasive alien species.
It is not currently known from any protected areas; its geographic range is not included in any of the 26 Ecuadorian State Natural Protected Areas.
Luis A. Coloma, Santiago Ron, Taran Grant 2004. Hyloxalus pumilus. In: IUCN 2014