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 Callithrix (Callithrix) geoffroyi Humboldt 1812 Callithrix (Callithrix) geoffroyi Humboldt 1812 , Rec. Obs. Zool. Anat. Comp.: 360 . Type Locality: Brazil , Victoria, between Rios Espirito Santo and Jucu. Vernacular Names: White-headed Marmoset . Synonyms: Callithrix (Callithrix) albifrons (Thunberg 1819) ; Callithrix (Callithrix) leucocephalus (Humboldt 1812) ; Callithrix (Callithrix) leucogenys ( Gray 1870 ) ; Callithrix (Callithrix) maximiliani (Reichenbach 1862) ; Callithrix (Callithrix) melanotis ( Lesson 1840 ) . Distribution: EC Brazil (coast of Bahia ). Conservation: CITES – Appendix II; IUCN – Vulnerable. Discussion: Subgenus Callithrix . Accepted as a species by Mittermeier et al. (1988) and Groves (1989).