White-headed langur
White-headed langur | |
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Specimen at Kunming Natural History Museum of Zoology | |
Scientific classification ![]() | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Primates |
Suborder: | Haplorhini |
Infraorder: | Simiiformes |
Family: | Cercopithecidae |
Genus: | Trachypithecus |
Species group: | Trachypithecus francoisi group |
Species: | T. leucocephalus
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Binomial name | |
Trachypithecus leucocephalus Tan, 1957
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Synonyms | |
T. poliocephalus leucocephalus |
The white-headed langur (Trachypithecus leucocephalus) is a critically endangered species of langur endemic to Guangxi, China.[2]
Taxonomy
It was formerly considered a subspecies of the Cat Ba langur (T. poliocephalus), which is now thought to be endemic to Vietnam.[2]
Its taxonomy was previously uncertain; it has been considered a partially albinistic population of the François' langur (T. francoisi), a subspecies of Francois' langur,[3] a valid species (T. leucocephalus), or a subspecies, T. poliocephalus leucocephalus. However, the IUCN Red List and American Society of Mammalogists now recognize it as a distinct species based on a 2007 study which split both species.[2][4][5]
Populations of this species in Chongzuo and Fusui display notable genetic divergence from the rest of the species, and it has thus been proposed they be treated as evolutionarily significant units.[4]
Description
This species is blackish in color with white crown, cheeks, and neck (in contrast to the similar T. poliocephalus, which has a golden crown, cheeks, and neck).[6]
Distribution
This species has a very small range in the province of Guangxi in southernmost China, where it is known from a few scattered populations. The Zuo River separates this species from Francois' langur, which is found to the north.[4]
Status
This species is considered critically endangered on the IUCN Red List. It is thought to have a population of no more than 600 individuals with roughly 250 mature individuals. None of the subpopulations of this species have more than 25 individuals. The main threat to this species is poaching and to a lesser extent habitat destruction. In addition, Francois' langurs have been released within the species' range and they have been known to hybridize with the white-headed langur, which may be genetically detrimental to it.[4]
References
- ^ Bleisch, B. & Long, Y. (2020). "Trachypithecus leucocephalus". IUCN Red List of Threatened Species. 2020: e.T39872A17988378. doi:10.2305/IUCN.UK.2020-2.RLTS.T39872A17988378.en. Retrieved 18 November 2021.
- ^ a b c "Explore the Database". www.mammaldiversity.org. Retrieved 2021-11-18.
- ^ Bradon-Jones, D. 1995. A revision of the Asian pied leaf monkeys (Mammalia: Cercopithecidae: Superspecies Semnopithecus auratus), with the description of a new subspecies. Raffles Bull. Zool. 43: 3-43
- ^ a b c d Bleisch, B.; Long, Yongcheng (2015-11-21). "IUCN Red List of Threatened Species: Trachypithecus leucocephalus". IUCN Red List of Threatened Species.
- ^ "Primates-SG - Vietnamese Journal of Primatology Volume 1 Issue 1". www.primate-sg.org. Retrieved 2021-11-18.
- ^ White-headed langur (Trachypithecus poliocephalus). Archived 2008-07-24 at the Wayback Machine ARKive. Accessed 2008-07-15
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- Articles with 'species' microformats
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- Trachypithecus
- Primates of East Asia
- Mammals of China
- Endemic fauna of China
- Critically endangered fauna of Asia
- Mammals described in 1957