Order Primates Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1 111 184 book chapter 0-8018-8221-4 10.5281/zenodo.7316519 Trachypithecus (Trachypithecus) hatinhensis Dao 1970 Trachypithecus (Trachypithecus) hatinhensis Dao 1970 , Mitt. Zool. Mus. Berlin, 46: 61 . Type Locality: Vietnam , Ha-tinh, Xom-cuc. Vernacular Names: Hatinh Langur . Distribution: Vietnam , Quang Binh and neighbouring regions. Conservation: CITES – Appendix II; U.S. ESA – Endangered as included in T. francoisi ; IUCN – Endangered as T. francoisi hatinhensis . Discussion: T. francoisi species group. Considered a species separate from francoisi by Brandon-Jones (1995) .