Thorius insperatus is a species of salamander in the family Plethodontidae. It is endemic to Sierra Juárez, Oaxaca, Mexico. The holotype was collected near Vista Hermosa, at asl. The specimen was collected under a log in forest. A second specimen was collected in 1998. The species is threatened by habitat loss caused by logging and expanding agriculture. References Thorius Endemic amphibians of Mexico Fauna of the Sierra Madre de Oaxaca Taxonomy articles created by Polbot Amphibians described in 1994