Atelopus dimorphus
family: Bufonidae
Species Description: Lotter S 2004 (2003) On the systematics of the harlequin frogs (Amphibian: Bufonidae: Atelopus) from Amazonia. III: A new, remarkably dimorphic species from the Cordillera Azul, Peru. Salamandra 39:169-180.
Conservation Status (definitions)
IUCN (Red List) Status Endangered (EN)
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 western versant of the Cordillera Azul, Huánuco Department, Peru, where it has been observed between 1,650 and 1,800m asl.

Habitat and Ecology

The general habitat in the area of collection is humid mountain forest. It is presumed to be a stream-breeding species.


It is currently known only from museum specimens, and was last recorded in 1980.

Population Trend


Major Threats

The threats to the species within its range on the Cordillera Azul have not been recorded. However, like other members of its genus, it is assumed to be at severe risk from chytridiomycosis.

Conservation Actions

It is not known to occur in any protected areas. In view of the likely threat of chytridiomycosis, it is a very high priority to conduct surveys to locate this species and determine its current population status; a captive-breeding programme may also need to be established.

Red List Status

Endangered (EN)


Listed as Endangered because of a projected population decline, estimated to be more than 50% over the next ten years, inferred from declines in other high altitude Atelopus species in the same region, probably due to chytridiomycosis.


Stefan Lötters 2004. Atelopus dimorphus. The IUCN Red List of Threatened Species 2004: e.T54503A11152536. .Downloaded on 19 February 2019


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