grizzled langur, thought to be extinct, was rediscovered in the Wehea Forest on the eastern tip of Borneo island, though it remains one of the world's most endangered primates. Taxonomy Two other genera, Trachypithecus and Semnopithecus, were formerly considered subgenera of Presbytis. The species-level taxonomy of Presbytis is complex, and significant changes have been proposed for several in recent years. Genus Presbytis Black-crested Sumatran langur, Presbytis melalophos Black-and-white langur Presbytis bicolor Black Sumatran langur Presbytis sumatrana Mitered langur Presbytis mitrata Raffles' banded langur, Presbytis femoralis Robinson's banded langur, Presbytis robinsoni East Sumatran banded langur, Presbytis percura Sarawak surili, Presbytis chrysomelas Bornean banded surili, Presbytis chrysomelas chrysomelas Tricolored surili, Presbytis chrysomelas cruciger White-thighed surili, Presbytis siamensis Malayan white-thighed surili, Presbytis siamensis siamensis Presbytis siamensis rhionis Presbytis siamensis cana Presbytis siamensis paenulata White-fronted surili, Presbytis frontata Javan surili, Presbytis comata Grizzled leaf monkey, Presbytis comata comata Javan fuscous langur, Presbytis comata fredericae Thomas's langur, Presbytis thomasi Hose's langur, Presbytis hosei Hose's grizzled langur, Presbytis hosei hosei Everett's grizzled langur, Presbytis hosei everetti Saban grizzled langur, Presbytis sabana Miller's langur, Presbytis canicrus Maroon leaf monkey, Presbytis rubicunda Muller's maroon langur, Presbytis rubicunda rubicunda Presbytis rubicunda rubida Presbytis rubicunda ignita Davis's maroon langur, Presbytis rubicunda chrysea Karimata Island maroon langur, Presbytis rubicunda carimatae Mentawai langur or joja, Presbytis potenziani Siberut langur, Presbytis siberu Natuna Island surili, Presbytis natunae References External links Primate Info Net Presbytis Factsheets Taxa named by Johann Friedrich von Eschscholtz