Dating term descriptions

This species was named Australopithecus ramidus in September 1994 (White et al.1994; Wood 1994) from some fragmentary fossils dated at 4.4 million years.

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Later fossil finds indicated that Ramapithecus was more closely related to the orang-utan, and new biochemical evidence indicated that the last common ancestor of hominids and apes occurred between 5 and 10 million years ago, and probably in the lower end of that range (Lewin 1987).

This species is known from a nearly complete cranium nicknamed Toumai, and a number of fragmentary lower jaws and teeth. tchadensis has many primitive apelike features, such as the small brainsize, along with others, such as the brow ridges and small canine teeth, which are characteristic of later hominids.