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

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