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).
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. In: IUCN 2013