[Morphological evolution of the first lower premolar of some higher primates]

Recent discoveries in Africa, in Asia and in Europe of new fossils attributed to the Ramapithecinae and/or to the Australopithecinae seem to point out the monocuspid origin of Man's first lower premolar the bicuspidy of the Gigantopithecidae, the Oreopithecidae' and the Hominidae' first lower premolar, reached at different geological ages, give an example of parallel evolution.