From the IUCN Red List Species Account:

Range Description

This species is known only from the Meseta Central of Chiapas, in northern San Cristobal de las Casas, Mexico, at 2,400m asl.

Habitat and Ecology

It occurs in pine-oak forests, presumably inhabiting and breeding in mountain streams.

Population

This is a rare species.

Population Trend

decreasing

Major Threats

The major threat to the species is clear-cut logging of its forest habitat, and transformation of the forest to agricultural land. Chytridiomycosis might also be a threat, since this is a high-elevation stream-dwelling species, and declines due to the disease have already been detected in other species of this genus.

Conservation Actions

The range of this species does not include any protected areas, and protection of the forested areas surrounding San Cristobal de las Casas is needed. This species is listed as "Threatened" (Amenazada) by the Mexican government. In view of the threat of chytridiomycosis, the population status of this species should be closely monitored, and ex-situ populations might need to be established.

Red List Status

Critically Endangered (CR)

Rationale

Listed as Critically Endangered because its Extent of Occurrence is less than 100km2, all individuals are in a single location, and there is continuing decline in the extent and quality of its habitat in Chiapas, Mexico.

Citation

Georgina Santos-Barrera, Luis Canseco-Márquez 2004. Plectrohyla pycnochila. The IUCN Red List of Threatened Species 2004: e.T55883A11370672. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T55883A11370672.en .Downloaded on 18 February 2019