Thorius macdougalli, commonly known as MacDougall's pigmy salamander, is a species of salamander in the family Plethodontidae. It is endemic to Oaxaca, Mexico, and is known from Cerro de Humo (its type locality) and Sierra de Juárez. Its natural habitat is pine-oak forest, but it also occurs in degraded habitats. It is threatened by habitat loss caused by clear-cutting and livestock grazing. References Thorius Endemic amphibians of Mexico Fauna of the Sierra Madre de Oaxaca Taxonomy articles created by Polbot Amphibians described in 1949