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) francoisi Pousargues 1898 Trachypithecus (Trachypithecus) francoisi Pousargues 1898 , Bull. Mus. Hist. Nat. Paris, 4: 319 . Type Locality: China , Kwangsi, Lungchow. Vernacular Names: Francois' Langur . Distribution: N Vietnam , C Laos , Kwangsi ( China ). Conservation: CITES – Appendix II; U.S. ESA – Endangered; IUCN – Vulnerable. Discussion: T. francoisi species group. The taxa poliocephalus , hatinhensis , laotum and delacouri , generally placed as subspecies of francoisi , were raised to specific rank by Brandon-Jones (1995) .