The dusky leaf monkey, spectacled langur, or spectacled leaf monkey (Trachypithecus obscurus) is a species of primate in the Cercopithecidae family. It is found in Malaysia, Myanmar, and Thailand.

There are several subspecies of this lutung:

Data related to Trachypithecus obscurus at Wikispecies Media related to Trachypithecus obscurus at Wikimedia Commons