Hylobates syndactylus (Raffles, 1821)

Hylobates syndactylus continentis (Thomas, 1908)

Siamanga syndactyla (Raffles, 1822)

Simia gibbon C.Miller, 1779

Simia syndactyla Raffles, 1821

Symphalangus continentis Thomas, 1908

Symphalangus gibbon (C.Miller, 1779)

Symphalangus subfossilis Hooijer, 1960

Symphalangus syndactylus continentis Thomas, 1908

Symphalangus syndactylus volzi Pohl, 1911

Symphalangus volzi (Pohl, 1911)