Paranthropus
Paranthropus first appeared roughly 2.7 million years ago. Most species of Paranthropus had a brain about 40 percent of the size of modern man. There was some size variation between the different species of Paranthropus, but most stood roughly 1.3-1.4 m (4.26 to 4.59 feet) tall and were quite well muscled. Paranthropus is thought to have lived in wooded areas rather than the grasslands of the Australopithecus.