This species is only known from the type locality (over about 1km) of the Alto Río Calima in the Valle del Cauca department on the western slopes of the Cordillera Occidental, Colombia, from 1,230-1,250m asl. Surveys of the surrounding area have not recorded the species indicating that it is most likely a very restricted range species.
Habitat and Ecology
It is found in vegetation along the stream and on rocks inside and immediately adjacent to the stream in low cloud forest. It breeds by direct development. It is only known from this one stream and is thought to be a microhabitat specialist, like other species of the group.
It is quite common at the type locality.
The main threat to this species is potentially the hydroelectric power dam only a few kilometres upstream, but there is no access to the species' habitat as it is part of the dam property. Its habitat does not appear to be otherwise threatened. Some other species of Eleutherodactylus that are associated with streams have undergone dramatic declines and disappearances, possibly due to chytridiomycosis, so the status of this species should be monitored carefully.
The type locality is not within a protected area, although it lies just outside the Parque Nacional Natural Farallones de Cali. This locality is within a "protected" area where the Corporación del Valle del Cauca (CVC) generates electricity as waters leave Lago Calima.
Fernando Castro, Maria Isabel Herrera, John Lynch 2004. Pristimantis diaphonus. In: IUCN 2014