Ardipithecus is a fossil hominoid, described by its discoverers as a very early hominin genus. Two species are described in the literature: A. ramidus, which lived about 4.4 million years ago during the early Pliocene, and A. kadabba, dated to approximately 5.6 million years ago (late Miocene).
Read more about Ardipithecus: Ardipithecus Ramidus, Ardipithecus Kadabba, Lifestyle, Contrary Views