Telmatobius macrostomus 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Telmatobiidae

Scientific Name: Telmatobius macrostomus (Peters, 1873)
Common Name(s):
English Lake Junin Frog, Andes Smooth Frog, Giant Lake Junin Frog, Junín Giant Frog, Lake Chinchaycocha Frog, Marbled Water Frog
Batrachophrynus brevipalmatus Müller, 1924
Batrachophrynus macrostomus Peters, 1873
Batrachophrynus microphtalmus Werner, 1901
Taxonomic Source(s): Frost, D.R. 2015. Amphibian Species of the World: an Online Reference. Version 6.0. New York, USA. Available at:

Assessment Information [top]

Red List Category & Criteria: Endangered A2cde ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Needs updating
Assessor(s): Ariadne Angulo, Ulrich Sinsch, César Aguilar Puntriano
Reviewer(s): Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson, Neil Cox and Bruce Young)
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.
Previously published Red List assessments:

Geographic Range [top]

Range Description: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.
Countries occurrence:
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Previously common, this species has undergone a noticeable decline over the last twenty years.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

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.

Use and Trade [top]

Use and Trade: This species is hunted for food. The actual percentage taken from the wild is not known; however it is known to be high.

Threats [top]

Major Threat(s): 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.

Conservation Actions [top]

Conservation Actions: 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.

Citation: Ariadne Angulo, Ulrich Sinsch, César Aguilar Puntriano. 2004. Telmatobius macrostomus. The IUCN Red List of Threatened Species 2004: e.T2645A9464237. . Downloaded on 18 July 2018.
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