The dusky leaf monkey, spectacled langur, or spectacled leaf monkey (Trachypithecus obscurus) is a species of primate in the family Cercopithecidae. It is found in Malaysia, Burma, and Thailand.
There are several subspecies of this lutung:
- Trachypithecus obscurus obscurus
- Trachypithecus obscurus flavicauda
- Trachypithecus obscurus halonifer
- Trachypithecus obscurus carbo
- Trachypithecus obscurus styx
- Trachypithecus obscurus seimundi
- Trachypithecus obscurus sactorum
