Dictionary of Human Evolution and Biology

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Prohylobates Fortau, 1918

Genus of cercopithecoids from the early Miocene of Africa; two species recognized; known only from tooth-bearing mandibular fragments. Originally believed to have features in common with living gibbons for whom it was postulated to be an ancestor. Estimated body mass: P. tandyi, 7 kg: P. simonsi, 25 kg. Dental formula: 2.1.2.3/2.1.2.3; poorly developed bilophodont molars; diet is presumed to be frugivory. P. simonsi has a thick mandible, suggesting that it was subjected to strong chewing stresses; for this reason, it has suggested that this species was also eating leaves for part of the year.

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