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Ardipithecus and later Hominina. The classification of Sahelanthropus in Hominina, as well as Ardipithecus and the 6-million-year-old Orrorin, was at odds with molecular analyses of the time, which had placed the CHLCA between 6 and 4 million years ago based on a high mutation rate of about 70 mutations per generation. All these genera were anatomically too derived to represent a basal hominin (the group

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