How thick was the tooth enamel of Ardipithecus compared with chimpanzees and Australopithecus?

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skeleton of “Ardi” — Ardipithecus Reconstructed frontal view of the skeleton of “Ardi,” a specimen belonging to the early hominid species *Ardipithecus ramidus*.

The tooth enamel of Ardipithecus is characterized as being intermediate in thickness. Specifically, it is thicker than the thin enamel found in living chimpanzees but thinner than the much thicker enamel observed in later species of Australopithecus.1