This species is known from a single locality (El Pedregal Reserve) in the Southern Distrito Federal, central Mexico, in the lava fields of Volcán Xitle, in the southern part of Mexico City.
Habitat and Ecology
It inhabits dry shrubland, and breeds by direct development.
This is not a very common species and it is difficult to collect.
The extension of Mexico City has resulted in the disappearance of most of the available suitable habitat for this species, with the result that it is now believed to be restricted to a very small protected area, the Pedregal Reserve. The Pedregal has been subject to long-term disturbance (fragmentation and isolation), and is now little more than an isolated vegetation fragment of 160 ha with no natural corridors.
Survey work is urgently needed to establish the current population status of this species, subsequent to which a recovery program and strict protection of the species in the Pedregal Reserve and surroundings areas might need to be implemented. It is protected by Mexican law under the "Special Protection" category (Pr).
Red List Status
Critically Endangered (CR)
Listed as Critically Endangered because its Extent of Occurrence is less than 100 km2 and its Area Of Occupancy is less than 10km2, all individuals are in a single location, and there is continuing decline in the extent and quality of its habitat south of Mexico City.
The taxonomic status of this species is uncertain.
Georgina Santos-Barrera, Oscar Flores-Villela 2004. Eleutherodactylus grandis. The IUCN Red List of Threatened Species 2004: e.T56629A11509838. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T56629A11509838.en .Downloaded on 21 January 2019