The Sierra Juarez hidden salamander (Thorius adelos), also known as the Sierra Juarez moss salamander, or simply Sierra Juarez salamander, is a species of salamander in the family Plethodontidae. It is endemic to the Caribbean slopes of the Sierra de Juarez and Sierra Mazateca, Oaxaca, Mexico.[1]
The holotype of Thorius adelos (an adult male) measures 21.1mm in snout–vent length and has a 25.1mm long tail. The dorsum and tail are brown. There is a dorsal, cream-coloured stripe on both sides. The snout is blunt with slightly upward-tilted nostrils.[2]
Thorius adelos is a very rare species only found in undisturbed cloud forests at elevations of 1530m–2050mm (5,020feet–6,730feetm) above sea level. It is found in bromeliads and other epiphytic plants and in leaf-litter. It is threatened by habitat loss caused by logging, expanding agriculture, and human settlements.