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Primates are now known to possess a keen sense of smell that serves them in various contexts, including feeding. Many primate species are frugivorous and provide essential seed dispersal services to a variety of plants. Studies of pollination ecology, and recently seed dispersal ecology, indicate that animal mutualist behavior exerts selection pressures that drive changes in flower and fruit traits. As a result, the use of olfaction in in primate feeding ecology may have affected the evolution of fruit odor in species that rely on primate seed dispersal. However, this hypothesis is seldom tested. Here, we summarize the available information on how primates may have affected the evolution of fruit odor. We ask what the chemistry of primate fruit odor may look like, what information fruit odor may convey, whether there are geographical differences in fruit odor, and what other factors may affect the odor of fruits …