''Nomascus'' is the second-most speciose

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of gibbons (family Hylobatidae). Originally, this genus was a subgenus of ''Hylobates'', and all individuals were considered one species, ''Hylobates concolor''. Species within ''Nomascus'' are characterized by 52 chromosomes. Some species are all black, some are light with a distinct black tuft of crown fur, and some have distinct, light-colored cheek patches. ''Nomascus'' is found from southern China (

Yunnan Yunnan , () is a landlocked Provinces of China, province in Southwest China, the southwest of the People's Republic of China. The province spans approximately and has a population of 48.3 million (as of 2018). The capital of the province is ...

) to southern

Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...

, and also on

Hainan Island Hainan (, ; ) is the smallest and southernmost province of the People's Republic of China (PRC), consisting of various islands in the South China Sea. , the largest and most populous island in China,The island of Taiwan, which is slightly ...

. One species, ''Nomascus nasutus,'' has been deemed "the most critically endangered ape species in the world". All species in this genus are either endangered or critically endangered.

Classification

* Family Hylobatidae: gibbons ** Genus '' Hylobates'' ** Genus ''

Hoolock The hoolock gibbons are three primate species of genus ''Hoolock'' in the gibbon family, Hylobatidae, native to eastern Bangladesh, Northeast India, Myanmar, and Southwest China. Description Hoolocks are the second-largest of the gibbons, after ...

'' ** Genus ''

Symphalangus The siamang (, ; ''Symphalangus syndactylus'') is an arboreal, black-furred gibbon native to the forests of Indonesia, Malaysia, and Thailand. The largest of the gibbons, the siamang can be twice the size of other gibbons, reaching in height, a ...

'' ** Genus ''Nomascus'' ***

Black crested gibbon The black crested gibbon (''Nomascus concolor'') is a Critically Endangered species of gibbon found in China, Laos, and northern Vietnam, with four subspecies. Taxonomy The taxonomy of the species is confused. Previously grouped in the ...

, ''Nomascus concolor'' **** Tonkin black crested gibbon, ''Nomascus concolor concolor'' **** Laotian black crested gibbon, ''Nomascus concolor lu'' **** Central Yunnan black crested gibbon, ''Nomascus concolor jingdongensis'' **** West Yunnan black crested gibbon, ''Nomascus concolor furvogaster'' ***

Eastern black crested gibbon The eastern black-crested gibbon (''Nomascus nasutus''), also known as the Cao-vit black crested gibbon or the Cao-vit crested gibbon, is a species of gibbon from southeast China and northern Vietnam. The term "Cao-vit" originated from the sounds ...

, ''Nomascus nasutus'' ***

Hainan black crested gibbon The Hainan black-crested gibbon or Hainan gibbon (''Nomascus hainanus''), is a Critically Endangered species of gibbon found only on Hainan Island, China. It was formerly considered a subspecies of the eastern black crested gibbon (''Nomascus na ...

, ''Nomascus hainanus'' ***

Northern white-cheeked gibbon The northern white-cheeked gibbon (''Nomascus leucogenys'') is a Critically Endangered species of gibbon native to South East Asia. It is closely related to the southern white-cheeked gibbon (''Nomascus siki''), with which it was previously co ...

, ''Nomascus leucogenys'' ***

Southern white-cheeked gibbon The southern white-cheeked gibbon (''Nomascus siki'') is a species of gibbon native to Vietnam and Laos. It is closely related to the northern white-cheeked gibbon (''Nomascus leucogenys'') and the yellow-cheeked gibbon (''Nomascus gabriellae'') ...

, ''Nomascus siki'' ***

Yellow-cheeked gibbon The yellow-cheeked gibbon (''Nomascus gabriellae''), also called the golden-cheeked gibbon, the yellow-cheeked crested gibbon, the golden-cheeked crested gibbon, the red-cheeked gibbon, or the buffed-cheeked gibbon, is a species of gibbon native ...

, ''Nomascus gabriellae'' *** Northern buffed-cheeked gibbon, ''Nomascus annamensis''

References

External links

*ARKive
images and movies of the black-crested gibbon ''(Nomascus concolor)''Gibbon Conservation CenterPrimate Info Net ''Hylobates (Nomascus) leucogenys'' Factsheet
{{Taxonbar, from=Q990943 Gibbons Mammals of Southeast Asia Primate genera Taxa named by Gerrit Smith Miller Jr. Taxa described in 1933