(I. Geoffroy, 1834)
The ursine colobus (Colobus vellerosus, white-thighed colobus, Geoffroy's black-and-white colobus, white-thighed black-and-white colobus) is a species of primate in the Cercopithecidae family. It is found in Benin, Ivory Coast, Ghana, Nigeria, and Togo, as well as very southernmost Burkina Faso. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.
- Groves, C. P. (2005). Wilson, D. E.; Reeder, D. M, eds. Mammal Species of the World (3rd ed.). Baltimore: Johns Hopkins University Press. p. 168. OCLC 62265494. ISBN 0-801-88221-4.
- Oates, J. F., Gippoliti, S. & Groves, C. P. (2008). Colobus vellerosus. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 4 January 2009.
- Detailed range map at "Range map: Colobus vellerosus" 10 January 2008, International Union for Conservation of Nature (IUCN)
- Groves, Colin P.; Angst, R. and Westwood, C. (1993) "The Status of Colobus polykomos dollmani" International Journal of Primatology 14: pp. 573–586
- Oates, J. F. and Trocco, T. F. (1983) "Taxonomy and phylogeny of black-and-white colobus monkeys: inferences from an analysis of loud call variation" Folia Primatologica 40: pp. 83–113
- "Combining this information [on loud calls] with data on cranial morphology (e.g. Hull, 1979) and pelage (e.g. Rahm, 1970), Oates and Trocco, (1983) concluded that the bIack-and-white colobus monkeys are best regarded as belonging to five species: Colobus polykomos (Zimmerman, 1780); C. vellerosus (Geoffroy, 1831); C. guereza (Ruppell, 1835); C. satanas (Waterhouse, 1838); and C. angolensis (Sclater, 1860). Oates and Trocco (1983) also concluded that C. salanas retains more primitive features than other members of the group. and that C. guereza and C. vellerosus, in their low-frequency loud call and other features, are the most derived species." page 432 of Oates, John F.; Bocian, C. M. and Terranova, C. J. (2000) "The loud calls of black-and-white colobus monkeys: their adaptive and taxonomic significance in light of new data" doi:10.1017/CBO9780511542589.017, In Whitehead, Paul F. Jolly, Clifford J. (2000) Old World Monkeys Cambridge University Press, Cambridge, England, pp. 431–452, ISBN 978-0-521-02809-7
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