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Semnopithecus is a genus of Old World monkeys native to the Indian subcontinent, with all species with the exception of two being commonly known as gray langurs. [1] Traditionally only the species Semnopithecus entellus was recognized, but since about 2001 additional species have been recognized.
The Colobinae or leaf-eating monkeys are a subfamily of the Old World monkey family that includes 61 species in 11 genera, including the black-and-white colobus, the large-nosed proboscis monkey, and the gray langurs. Some classifications split the colobine monkeys into two tribes, while
Miller's langur is a leaf monkey within the family Cercopithecidae and subfamily Colobinae. [2] It was formerly considered a subspecies of Hose's langur, Presbytis hosei (as Presbytis hosei canicrus). [3] [2] [4] [5] It was split from P. hosei on the basis of different morphology by primatologists Colin Groves and Christian Roos. [3] [6]
Old World monkey genera include baboons (genus Papio), red colobus (genus Piliocolobus), and macaques (genus Macaca). Common names for other Old World monkeys include the talapoin, guenon, colobus, douc (douc langur, genus Pygathrix), vervet, gelada, mangabey (a group of genera), langur, mandrill, drill, surili , patas, and proboscis monkey.
François' langur (Trachypithecus francoisi), also known as Francois' leaf monkey, the Tonkin leaf monkey, or the white side-burned black langur [3] is a species of Old World monkey and the type species of its species group. It is one of the least studied of the species belonging to the Colobinae subfamily. [4]
The dusky leaf monkey (Trachypithecus obscurus), also known as the spectacled langur or the spectacled leaf monkey, is a species of primate in the family Cercopithecidae. It is found in Peninsular Malaysia , Myanmar and Thailand , [ 2 ] and can occasionally be found in Singapore . [ 3 ]
Gee's golden langur geographic range Gee's golden langur ( Trachypithecus geei ), also known as simply the golden langur , is an Old World monkey found in a small region of Western Assam , India and the neighboring foothills of the Black Mountains of Bhutan .
The northern plains gray langur belongs to the genus Semnopithecus along with the other Indian langurs. The southern plains gray langur was once classified as a subspecies of S. entellus, i.e., S. entellus dussumieri and later regarded as a separate species, i.e., S. dussumieri, but is now regarded as an invalid taxon.