Telmatobius mendelsoni
family: Telmatobiidae
Species Description: De la Riva I, Trueb L, Duellman WE 2012 A new species of Telmatobius (Anura: Telmatobiidae) from montane forests of southern Peru, with a review of osteological features of the genus. South American J Herpetology 7: 91-109.

© 2013 Alessandro Catenazzi (1 of 2)
Conservation Status (definitions)
IUCN (Red List) Status Critically Endangered (CR)
Other International Status None
National Status None
Regional Status None

Country distribution from AmphibiaWeb's database: Peru


View distribution map using BerkeleyMapper.


From the IUCN Red List Species Account:


Range Description

This species is known only from the Río Kosñipata Valley in the Cordillera de Paucartambo, Cusco Region (De la Riva et al. 2012) and from Ccarapa, Ayacucho Region (Ttito et al. 2016), in Peru. It occurs at altitudes between 1,700–2,800 m asl and its extent of occurrence (EOO) is 2,627 km2.

Habitat and Ecology

This species inhabits roadside ditches and forest streams in humid montane forests. Individuals have been collected from shallow roadside ditch with barely flowing water and a stream bordered by bamboo and bromeliads (De la Riva et al. 2012). Reproduction occurs by larval development.


It was once a common species and observed regularly in Kosñipata until 2007. No specimens have been seen in Kosñipata since one calling male was observed in July 2007 (Catenazzi et al. 2011), at a spring where frogs had been heard calling and tadpoles had been consistently seen. The species was not observed in field surveys in 2008, 2009 or 2012–2016 (A. Catenazzi pers. comm. April 2017, Catenazzi et al. 2011). Preliminary data indicate the arrival of Batrachochytrium dendrobatidis to this region between 2000 and 2007 (A. Catenazzi unpublished data) and population declines of this species have been associated with outbreaks of Bd (Catenazzi et al. 2011, von May et al. 2008). Nothing is known about the status of the subpopulation from Ayacucho as it is only know from one museum specimen (Ttito et al. 2016).

Population Trend


Major Threats

Major population declines in this species have been associated with outbreaks of Batrachochytrium dendrobatidis (Catenazzi et al. 2011, von May et al. 2008).

Conservation Actions

Conservation Actions
This species occurs in Manu National Park. It is listed as Critically Endangered (CR) in Peru according to the Categorization in Endangered Species of Wild Fauna (Decreto Supremo Nº004-2014-MINAGRI). 

Conservation Needed
Continuous monitoring for Batrachochytrium dendrobatidis infections is recommended.

Research Needed
Further survey work is necessary to determine whether the species is still extant. More information is needed on this species' distribution, population status, ecology, and threats. There is a need for monitoring the population status of this species given the threat of chytridiomycosis.

Red List Status

Critically Endangered (CR)


Listed as Critically Endangered because of an observed population decline, estimated to be more than 80% over the past 10 years, inferred from the impact of chytridiomycosis on this species.


IUCN SSC Amphibian Specialist Group 2017. Telmatobius mendelsoni. The IUCN Red List of Threatened Species 2017: e.T45536685A45536687. .Downloaded on 23 January 2019


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