This species has a relatively wide distribution in the Sierra de Juarez and the mountains above Totontepec, north-central Oaxaca, Mexico, at 2,300-3,000m asl.
Habitat and Ecology
It is a terrestrial species that inhabits pine-oak forests. It also occurs in degraded habitats. It reproduces by direct development.
It was formerly very abundant, but underwent major declines since the 1970s, and is now uncommon.
There is some forest loss in its range due to clear-cutting and livestock grazing.
It has not been recorded in any protected areas, and there is an urgent need for the protection of pine-oak forest habitat in the Sierra de Juarez. This species is protected by Mexican law under the "Special Protection" category (Pr).
Red List Status
Listed as Vulnerable because it is known from only five locations, and although the populations have experienced a major decline since the 1970s, the populations now appear to be somewhat stable, albeit reduced. The rate of deforestation also seems to have substantially decreased compared to earlier years.
Gabriela Parra-Olea, David Wake, James Hanken 2008. Thorius macdougalli. The IUCN Red List of Threatened Species 2008: e.T59415A11935236. http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T59415A11935236.en