page_title: Colobinae
section_title: Classification
hierarchical_section_title: Colobinae / Classification
caption_attribution_description: English: Nilgiri Langur in the Periyar National Park and Wildlife Sanctuary, Kerala, India
context_page_description: The Colobinae 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 others split them into three groups. Both classifications put the three African genera Colobus, Piliocolobus, and Procolobus in one group; these genera are distinct in that they have stub thumbs. The various Asian genera are placed into another one or two groups. Analysis of mtDNA confirms the Asian species form two distinct groups, one of langurs and the other of the "odd-nosed" species, but are inconsistent as to the relationships of the gray langurs; some studies suggest that the gray langurs are not closely related to either of these groups, while others place them firmly within the langur group.
context_section_description: Family Cercopithecidae
  Subfamily Cercopithecinae
  Subfamily Colobinae
  African group
  Genus Colobus - black-and-white colobus monkeys
  Genus Piliocolobus - red colobus monkeys
  Genus Procolobus - olive colobus
  Langur (leaf monkey) group
  Genus Trachypithecus - lutungs
  Genus Presbytis - surilis
  Genus Semnopithecus - gray langurs
  Odd-nosed group
  Genus Pygathrix - doucs
  Genus Rhinopithecus - snub-nosed monkeys
  Genus Nasalis - proboscis monkey
  Genus Simias - pig-tailed langur
  Genus Mesopithecus - extinct
caption: Nilgiri langur (Trachypithecus johnii)
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