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 Nasalis E. Geoffroy 1812 Nasalis E. Geoffroy 1812 , Ann. Mus. Hist. Nat. Paris, 19: 89 . Type Species: Cercopithecus larvatus Wurmb 1787 Synonyms: Hanno Gray 1821 ; Rhinolazon Gloger 1841 ; Rhynchopithecus Dahlbohm 1856 . Species and subspecies: 1 species: Species Nasalis larvatus (Wurmb 1787) Discussion: Simias was included in this genus by Groves (1970:639) and McKenna and Bell (1997) , and by Szalay and Delson (1979) and Delson (1975:217) who considered Simias a subgenus; but also see Krumbiegel (1978) and Napier (1985) , who considered it as a distinct genus.