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) phayrei subsp. crepuscula Elliot 1909 Synonyms: Trachypithecus (Trachypithecus) phayrei subsp. argenteus (Kloss 1919) ; Trachypithecus (Trachypithecus) phayrei subsp. wroughtoni (Elliot 1909) .