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 Ateles hybridus I. Geoffroy 1829 Ateles hybridus I. Geoffroy 1829 , Mem. Mus. Paris, 17: 168 . Type Locality: Colombia , valley of Rio Magdalena , La Gloria. Vernacular Names: Brown Spider Monkey . Synonyms: Ateles albifrons Gray 1870 ; Ateles brunneus Gray 1870 ; Ateles loysi (Montandon 1929) . Distribution: N Colombia and NW Venezuela . Conservation: CITES – Appendix II; IUCN – Endangered as A. h. hybridus and A. h. brunneus . Discussion: Separated from belzebuth by Froehlich et al. (1991). Rylands et al. (2000) recognized brunneus as a subspecies.