Dictionary of Human Evolution and Biology

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Third Premolar

Premolar that is posterior to the first two premolars in a mammal. During the course of evolution primates have lost anterior premolars; thus, the third premolar may actually be the most anterior premolar in a species, such as in humans. However, some workers number teeth by those actually present in a species; in such a case humans would not have a third premolar.

See P1, P2, P3, etc.

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