Microkayla guillei
family: Strabomantidae
subfamily: Holoadeninae
Species Description: de la Riva I 2007 Bolivian frogs of the genus Phrynopus, with descriptions of twelve new species (Anura: Brachycephalidae). Herpt. Monog.21: 247-277
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: Bolivia



View distribution map using BerkeleyMapper.

From the IUCN Red List Species Account:


Range Description

Psychrophrynella guillei is only known from the type locality: ca 4 km E of Chullina (3,590 m asl), Cantón Charazani, Province of Saavedra, Department of La Paz, Bolivia. This locality is on the top of the mountain range that separates the valleys of the Río Charazani and Río Quillhuacota, on the Amazonian slopes of the Cordillera de Apolobamba (De la Riva 2007). It is thought to have restricted geographical and altitudinal ranges (I. De la Riva pers. comm. 2008).

Habitat and Ecology

This species inhabits an area that is heavily cultivated, with old terraces. Frogs of this species can be heard calling in the morning from a patch of forest with ferns and mosses. Males call when mist rolls over the vegetation (De la Riva 2007). This species presumably reproduces by direct development.


No population status information is currently available for this species.

Population Trend


Major Threats

Traditional agriculture has been reported for the type locality (De la Riva 2007). There is limited connectivity between forest patches. If relictual forest formations disappear, the species may also disappear with them. In addition, a restricted geographic distribution and the predicted effects of climate change (e.g., drying up of regions) are considered to pose serious threats to the species (I. De la Riva pers. comm. 2008).

Conservation Actions

No conservation measures are currently known for this species.

Red List Status

Critically Endangered (CR)


Listed as Critically Endangered in view of its restricted extent of occurrence (currently less than 20 km²), occurrence in only one locality, and a projected decline in the extent and quality of its habitat due to habitat loss through expanding agriculture and the possible impacts of climate change.

Taxonomic Notes

Psychrophrynella guillei is distinguished from other similar species by a combination of colour patterns and morphological features (De la Riva 2007).


De la Riva, I. & Angulo, A. 2009. Psychrophrynella guillei. The IUCN Red List of Threatened Species 2009: e.T135999A4224501. .Downloaded on 23 February 2019


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