This species is only known with certainty from the Cerro San Felipe region, central Oaxaca, Mexico, at 2,100-2,500m asl.
Habitat and Ecology
It is a terrestrial species that inhabits deciduous forest, including forest with some pines, living on the ground where it is usually found beneath leaves and bark. The species can survive in degraded forest (in fact, this is all that remains within its known range). It presumably reproduces by direct development.
It used to be relatively common, but it appears to have undergone declines and is now quite rare.
The major threat to the species is habitat loss due to subsistence agriculture (including livestock farming), logging, and human settlement. The remaining habitat in its range is already severely degraded.
It might occur in Parque Nacional Benito Juarez, but there are, as yet, no confirmed records from this protected area. This species is protected by Mexican law under the "Special Protection" category (Pr).
Red List Status
Listed as Endangered because its Extent of Occurrence is less than 5,000 km2, all individuals are known with certainty from only one location, and there is continuing decline in the extent and quality of its habitat, and in the number of mature individuals, in Oaxaca, Mexico.
Populations attributed to this species from locations other than the type locality (Cerro San Felipe) need to be confirmed and are currently not included here.
Gabriela Parra-Olea, David Wake, James Hanken 2008. Thorius pulmonaris. The IUCN Red List of Threatened Species 2008: e.T59425A11939164. http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T59425A11939164.en .Downloaded on 19 January 2019