Comparative analysis of 3-dimensional molar crown morphology of extant and fossil hominoids

对化石和现存的原始人和原始人物种的磨牙釉质厚度和牙冠形态进行了详细的比较。中新世类人猿Chorapithecus的磨牙形态显示出与现存大猩猩相似的功能适应。现存的潘属两种牙釉质具有独特的牙釉质分布模式，咬合盆地的牙釉质非常薄。这种模式在4.4岁的Ardipithecus ramidus的磨牙上看不到。Mya原始人物种

Molar enamel thickness and crown morphology has been compared in detail for fossil and extant hominid and hominoid species. Molar morphology of the Miocene ape Chororapithecus shows a similar functional adaptation with extant gorilla. Extant two species of the genus Pan share a unique pattern of enamel distribution such that the occlusal basin enamel is remarkably thin. This pattern is not seen in the molars of Ardipithecus ramidus, a 4.4. mya hominid species.