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, 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.

Classifications [top]

5. Wetlands (inland) -> 5.5. Wetlands (inland) - Permanent Freshwater Lakes (over 8ha)
1. Land/water protection -> 1.2. Resource & habitat protection
2. Land/water management -> 2.1. Site/area management
3. Species management -> 3.1. Species management -> 3.1.1. Harvest management
3. Species management -> 3.1. Species management -> 3.1.2. Trade management
4. Education & awareness -> 4.1. Formal education
4. Education & awareness -> 4.3. Awareness & communications
5. Law & policy -> 5.1. Legislation -> 5.1.2. National level
5. Law & policy -> 5.1. Legislation -> 5.1.3. Sub-national level

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Conservation sites identified:Yes, over entire range
  Occur in at least one PA:Yes
In-Place Species Management
In-Place Education
5. Biological resource use -> 5.1. Hunting & trapping terrestrial animals -> 5.1.1. Intentional use (species is the target)
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

8. Invasive and other problematic species, genes & diseases -> 8.1. Invasive non-native/alien species/diseases -> 8.1.2. Named species [ Unspecified SALMONIDAE ]
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

9. Pollution -> 9.3. Agricultural & forestry effluents -> 9.3.4. Type Unknown/Unrecorded
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats
1. Research -> 1.6. Actions
3. Monitoring -> 3.1. Population trends

♦  Food - human
 Local : ✓   National : ✓ 

Bibliography [top]

Czopek, J. 1983. Distribution of capillaries in the respiratory surfaces in two species of Batrachophrynus (Amphibia, Anura, Leptodactylidae). Zoologica Poloniae: 211-226.

Czopek, J. 1984. Specific vascularization of the skin in two species of Batrachophrynus Peters 1873 (Amphibia, Anura, Leptodactylidae). Przeglad Zoologiczny: 265-268.

Dubois, A. 1984. La nomenclature supragenerique des amphibiens anoures. Memoires du Museum National d'Histoire Naturelle Serie A Zoologie: 1-64.

Instituto Nacional de Recursos Naturales (INRENA). 2000. Mapa de areas naturales protegidas del Peru.

IUCN. 2004. 2004 IUCN Red List of Threatened Species. Available at: (Accessed: 23 November 2004).

Leja, M. 1991. Der Kleine Junin-Frosch im Aquarium. DATZ: 708-710.

Rodríguez, L.O., Cordova, J.H. and Icochea, J. 1993. Lista preliminar de los anfibios del Peru. Publicaciones del Museo de Historia Natural U.N.M.S.M. 45: 1-22.

Sinsch, U. 1986. Anfibios de la sierra central del Peru. Boletin de Lima 45: 23-33.

Sinsch, U. 1990. Froschlurche (Anura) der zentral-peruanischen Anden: Artdiagnose, Taxonomie, Habitate, Verhaltensokologie. Salamandra 26: 177-214.

Szarski, H. 1979. Cell dimensions in the tissue of two species of Batrachophrynus (Amphibia, Anura, Leptodactylidae). Bulletin de l'Academie Polonaise des Sciences Serie des Sciences Biologiques: 277-280.

Tantalean, M. and Garcia, L. 1989. Contribucion al estudio de los helmintos parasitos de anfibios del Peru. Boletin de Lima: 69-77.

Tantalean, M. and Garcia, L. 1993. Trematodes de la familia Gorgoderidae en anfibios Leptodactylidae de la region altoandina del Peru. Boletin de Lima: 25-27.

Citation: Ariadne Angulo, Ulrich Sinsch, César Aguilar Puntriano. 2004. Telmatobius macrostomus. The IUCN Red List of Threatened Species 2004: e.T2645A9464237. . Downloaded on 21 June 2018.
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