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rate among mammals, with one speciation event per lineage every 3 million years. However, not all primate species have a high speciation rate; this is reflected in their deme size and social structure. Guenons (Cercopithecus), for example, live together in small polygynous troops and are a quite diverse genus. On the other hand, baboons (Papio) have a much lower speciation rate. Baboons have larger deme sizes because they live in polygynous multi-male

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