Catopithecus
It is known from more than 16 specimens of a single species, Catopithecus browni, found in the Jebel Qatrani Formation of the Faiyum Governorate, Egypt.The mandible was found with intact molars 1-3, and premolars 3-4, and alveoli are present for a canine tooth and incisors 1-2, indicating a lower dental formula of 2.1.2.3.[6] The dentition of C. browni shows well developed crests on the buccal side (nearest to the cheek) of the tooth which is indicative of a folivorous and/or insectivorous diet, both of which require teeth expressing the cutting edges seen on the molars of C.[5] Both upper and lower canines were observed to be relatively large and long compared to the adjacent spatulate, and vertically placed incisors which are all features of modern anthropoids.C. browni expresses notable derived anthropoid and catarrhine traits including an "anthropoidea-like" auditory region, a reduction in the number of premolars per quadrant of both the maxilla and mandible, and the degree of observed postorbital closure.