Thorius troglodytes (common name: Taylor's pigmy salamander) is a species of salamander in the family Plethodontidae that is endemic to Mexico. It is found only in mountains near the village of Acultzingo (Veracruz) at elevations of 2,380–3,000 m (7,810–9,840 ft) asl. Its natural habitats are pine-oak forests (including somewhat degraded forests) where it lives under bark, logs, in wood chips, and under rocks. This formerly very common species has declined. It is threatened by habitat loss caused by logging, livestock farming, and subsistence agriculture.