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| | The Living Primates |
 | | Their tail, which is stiff and hairless except for a tassel at the tip, is used for balance and to keep them from slipping down the vertical supports they cling to. |
 | | A distinctive feature of spider monkeys is their reduced thumb, which is either absent or represented by a small stump. |
 | | Genera: Cercopithecus (Guenons and Vervet), Allenopithecus (Swamp monkey), Miopithecus (Talapoin), Cercocebus (Mangabeys), Erythrocebus (Patas monkey), Macaca (Macaques), Mandrillus (Mandrill and Drill Baboons), Papio (Baboons), Theropithecus (Gelada baboon) |
| www.anth.ucsb.edu /faculty/walker/classes/anth121/121primates.htm (3476 words) |
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