This species occurs in Junin and Pasco Departments in Peru; it has also been introduced into the upper valley of the Río Mantaro, in the central Andes of Peru. It has an altitudinal range of 3,200-4,300m asl.
Habitat and Ecology
It is an exclusively aquatic species and can be found in marshy lakes such as Lake Junin and smaller, deep, isolated lakes.
Previously common, this species has undergone a noticeable decline over the last twenty years.
The species is threatened by introduction of trout into lakes in the high Andes, by uncontrolled exploitation as a food source, and potentially through the loss of habitat quality due to water pollution.
Based on its known habitat preferences and distribution, this species occurs in the Reserva Nacional de Junin and may also occur in the Santuario Nacional Huayllay and the Santuario Historico Chacamarca. Measures are urgently required to control and manage the offtake of this species from the wild.
Red List Status
Listed as Endangered because of a serious population decline, estimated to be more than 50% over the last three generations, inferred from harvest levels, observed shrinkage in distribution, predation by introduced species and anecdotal information on habitat destruction and/or degradation.
Ariadne Angulo, Ulrich Sinsch, César Aguilar Puntriano 2004. Telmatobius macrostomus. The IUCN Red List of Threatened Species 2004: e.T2645A9464237. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T2645A9464237.en