Nomascus concolor subsp. concolor Harlan 1826

Nomascus concolor subsp. concolor Harlan 1826, J. Acad. Nat. Sci. Philadelphia, ser. 5, 4: 231.

Type Locality: Vietnam, Tonkin.

Synonyms: Nomascus concolor subsp. harlani Lesson 1827; Nomascus concolor subsp. henrici de Pousargues 1897; Nomascus concolor subsp. niger Ogilby 1840 .