International Journal of Primatology, Vol. 24, No. 6, December 2003 ( C  2003) Assessment of the Diversity of African Primates Peter Grubb, 1,8 Thomas M. Butynski, 2 John F. Oates, 3 Simon K. Bearder, 4 Todd R. Disotell, 5 Colin P. Groves, 6 and Thomas T. Struhsaker 7 Received November 18, 2002; accepted March 3, 2003 This account of the systematics of African primates is the consensus view of a group of authors who attended the Workshop of the IUCN/SSC Primate Spe- cialist Group held at Orlando, Florida, in February 2000. We list all species and subspecies that we consider to be valid, together with a selected synonymy for all names that have been controversial in recent years or that have been considered to be valid by other authors in recent publications. For genera, species-groups or species, we tabulate and discuss different published system- atic interpretations, with emphasis on more recent publications. We explain why we have adopted our taxonomic treatment and give particular attention to cases where more research is urgently required and in which systematic changes are most likely to be made. For all taxa, from suborder to subspecies, we provide English names. KEY WORDS: Africa; Primates; species; subspecies; systematics; taxonomy. 1 35 Downhills Park Road, London N17 6PE, UK. 2 Africa Biodiversity Conservation Program, Zoo Atlanta, c/o National Museums of Kenya, Institute of Primate Research, P.O. Box 24434, Nairobi, Kenya (present address: Conservation International, c/o IUCN, P.O. Box 68200, Langata 00200, Nairobi, Kenya). 3 Department of Anthropology, Hunter College, 695 Park Avenue, New York, New York 10021, USA. 4 Nocturnal Primate Research Group, Anthropology Department, Social Sciences and Law, Oxford Brookes University, Gipsy Lane, Headington, Oxford OX3 0BP, UK. 5 New York University, Department of Anthropology, 100 Rufus D. Smith Hall, 25 Waverly Place, New York, New York 10003, USA. 6 Department of Prehistory and Anthropology, The Australian National University, GPO Box 4, Canberra ACT 2601, Australia. 7 Duke University, Department of Biological Anthropology and Anatomy, Box 90383, Durham, North Carolina 27708-0383, USA. 8 To whom correspondence should be addressed: e-mail: Pgrubb35@aol.com. 1301 0164-0291/03/1200-1301/0 C  2003 Plenum Publishing Corporation