The Tenasserim lutung (''Trachypithecus barbei'') is a species of

Old World monkey Old World monkeys are primates in the family Cercopithecidae (). Twenty-four genera and 138 species are recognized, making it the largest primate family. Old World monkey genera include baboons (genus '' Papio''), red colobus (genus '' Piliocolob ...

. It is found in

Myanmar Myanmar, officially the Republic of the Union of Myanmar; and also referred to as Burma (the official English name until 1989), is a country in northwest Southeast Asia. It is the largest country by area in Mainland Southeast Asia and has ...

and

Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...

. It is named after the

Tenasserim Hills The Tenasserim Hills or Tenasserim Range (, ; , , ; ) is the geographical name of a roughly 1,700 km long mountain chain, part of the Indo-Malayan mountain system in Southeast Asia. Despite their relatively scant altitude these mo ...

. Phylogenetic evidence indicates that the Tenasserim lutung is an ancestor of the far more widespread Indochinese grey langur (''T. crepusculus''), with ''T. crepusculus'' being a product of ancient hybridization between the Tenasserim lutung and ancestral ''obscurus''-group langurs.

References

Trachypithecus Primates of Southeast Asia Mammals of Myanmar Mammals of Thailand Mammals described in 1847 Taxa named by Edward Blyth Tenasserim Hills {{oldworld-monkey-stub