Tenasserim lutung
The Tenasserim lutung is a species of Old World monkey. It is found in Myanmar and Thailand.
It is named after the Tenasserim Hills.
Phylogenetic evidence indicates that the Tenasserim lutung is an ancestor of the far more widespread Indochinese grey langur, with T. crepusculus being a product of ancient hybridization between the Tenasserim lutung and ancestral obscurus-group langurs.