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 Semnopithecus Desmarest 1822 Semnopithecus Desmarest 1822 , Mammalogie, in: Encycl. Meth., 2 (Suppl.): 532 . Type Species: Simia entellus Dufresne 1797 Species and subspecies: 7 species: Species Semnopithecus ajax Pocock 1928 Species Semnopithecus dussumieri I. Geoffroy 1843 Species Semnopithecus entellus (Dufresne 1797) Species Semnopithecus hector Pocock 1928 Species Semnopithecus hypoleucos Blyth 1841 Species Semnopithecus priam Blyth 1844 Species Semnopithecus schistaceus Hodgson 1840 Discussion: Considered a subgenus of Presbytis by Szalay and Delson (1979) ; separated from Presbytis by Groves (1989). All taxa have generally been placed in a single species ( entellus ), but Groves (2001 c ) divided them into seven species.