Classification of the subgenus Hylobates (Nomascus)

G. Nomascus Miller 1933
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Nomascus annamensis Van Ngoc Thinh et al. 2010
Nomascus concolor Harlan 1826 [black crested gibbon]
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Hylobates concolor henrici de Pousargues 1896
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Invalid names: Hylobates concolor jingdongensis Ma and Wang 1986 [synonym]
Nomascus concolor lu Delacour 1951 [Laotian black crested gibbon]
Invalid names: Hylobates concolor furvogaster Ma and Wang 1986 [synonym], Hylobates harlani Lesson 1827 [synonym], Hylobates niger Ogilby 1840 [synonym]
Nomascus gabriellae Thomas 1909 [yellow-cheeked gibbon]
Nomascus hainanus Thomas 1892 [Hainan black crested gibbon]
Nomascus leucogenys Ogilby 1840 [northern white-cheeked gibbon]
Nomascus nasutus Kunkel d'Herculais 1884 [eastern black crested gibbon]
Nomascus siki Delacour 1951 [southern white-cheeked gibbon]