This species is known only from the type locality: 5.8km (by road) west of Totontepec (17° 14' 24''N; 96° 03' 36"W), at an elevation of 2,103m asl, on the Sierra Mixes in northern Oaxaca, Mexico. It might occur more widely, but it is believed to have a small distribution.
Habitat and Ecology
It was collected in pristine cloud forest, and was found in crevices in boulders in a small stream and on leaves of vegetation surrounding the same stream. It is presumed to reproduce by larval development in the water.
The population status of this recently described species is not known.
The type locality of this species was totally cleared and burned as far back as 1983, and the stream was badly silted and littered with burned logs. Even if the species does occur elsewhere, chytridiomycosis is a very real threat, since it is a high-elevation stream-dweller, and declines due to the disease have been detected amongst other species of this genus.
The species is not known to occur in any protected areas. In view of the risk of chytridiomycosis, it is a very high priority to conduct surveys to relocate this species and determine whether or not it still survives in the wild.
This species was previously included in the genus Hyla but has recently been moved to the genus Plectrohyla (Faivovich et al. 2005).
Georgina Santos-Barrera 2006. Plectrohyla psarosema. In: IUCN 2014