This species occurs in the Sierra Madre del Sur in southern Oaxaca, north to about San Gabriel Mixtepec and Jalatengo, Mexico, at between 1,200 and 1,700m asl.
Habitat and Ecology
This species inhabits cloud forest. It generally dwells on low vegetation along streams, and breeds in permanent streams.
This has always been a rare species, but it appears to have gone into serious decline, and has not seen recorded since the 1960s. Recent surveys to locate it have been unsuccessful, and it might now be extinct.
The destruction and degradation of its cloud forest habitat is a major threat to this species, and there is high pressure from infrastructure development for human settlements, and other anthropogenic activities in this region. However, this species has also disappeared in suitable habitat, probably due to chytridiomycosis.
This species is not known to occur in any protected areas. There is a need for further survey work in areas of suitable habitat in order to determine whether or not this species still survives in its natural range, and to evaluate the present condition of the forested areas north to San Gabriel Mixtepec. The protection of remaining intact habitat within this area is recommended.
Red List Status
Critically Endangered (CR)
Listed as Critically Endangered because of a drastic population decline, estimated to be more than 80% over the last three generations, inferred from the apparent disappearance of most, or all, of the population, probably due to chytridiomycosis.
This species was previously included in the genus Hyla but has recently been moved to the new genus Megastomatohyla (Faivovich et al. 2005).
Georgina Santos-Barrera, Luis Canseco-Márquez 2004. Megastomatohyla pellita. The IUCN Red List of Threatened Species 2004: e.T55592A11325496. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T55592A11325496.en .Downloaded on 17 January 2019