Nymphargus phenax
family: Centrolenidae
subfamily: Centroleninae

© 2009 José M. Padial (1 of 3)
Conservation Status (definitions)
IUCN (Red List) Status Data Deficient (DD)
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 was formerly known only from the type locality of Tutumbaro (at 1,840 m asl) on the Río Piene, Ayacucho Region, in southern Peru. Since the previous assessment, it has also been recorded in a stream of the vicinity of Cajadela Community (at 1,837 m asl) in the Apurimac River drainage, Ayacucho Region (G. Chávez pers. comm. March 2018). The two known localities are separated by 45 km (airline). It might range much more widely, but there has been little survey work of the surrounding areas. Its extent of occurrence (EOO) is 162 km2 and all individuals occur in two threat-defined locations.

Habitat and Ecology

This species inhabits primary and secondary cloud forest (Cannatella and Duellman 1982). Individuals have been recorded calling at night from the upper sides of leaves within 1 m of a slow stream. Eggs are presumably laid on leaves, with larval development in streams. It is unknown whether it can tolerate habitat disturbance.


There is little information about its population status, as it is only known from four adult males collected in 1975 (Cannatella and Duellman 1982) and one additional individual collected in 2010 (G. Chávez pers. comm. March 2018). In 2011, a survey in the vicinity of the type locality did not record the species (V.J. Vargas pers. comm. March 2018). Due to ongoing decline in the extent and quality of habitat, the population is suspected to be decreasing.

Population Trend


Major Threats

The area where this species occurs is subject to localized loss and degradation of habitats due to human colonization, agricultural development (V.J. Vargas pers. comm. March 2018), and small-scale logging activities can be observed from satellite imagery. The forest in the vicinity of Cajadela is being destroyed due to the establishment of red chili and coca farms (G. Chávez pers. comm. March 2018).

Conservation Actions

Conservation Actions
This species has not been recorded in any protected areas.

Conservation Needed
Habitat protection is required to conserve this species.

Research Needed
Further surveys are needed to better understand this species' distribution, population status, and ecology.

Red List Status

Data Deficient (DD)


Listed as Endangered because of its extent of occurrence (EOO) of 162 km2, it occurs in two threat-defined locations, and there is continuing decline in the extent and quality of its habitat in the Apurimac River drainage in Peru.


IUCN SSC Amphibian Specialist Group 2018. Nymphargus phenax. The IUCN Red List of Threatened Species 2018: e.T54979A89198547. .Downloaded on 20 January 2019


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