Chapter 6: The First Hominids and the Emergence of Homo

Question 1

Sahelanthropustchadensis

Answer 1

A hominoid found in Chad dating to around 7 million years ago

Question 2

Orrorintugenensis

Answer 2

An apparently bipedal primate dating to between 5.8 and 6 million years, making it possibly the earliest known hominid

Question 3

Ardipithecusramidus

Answer 3

Perhaps the first hominid, dating to about 4.5 million years ago. Its dentition combines ape-like and australopithecine-like features, and its skeleton suggests it was bipedal.

Question 4

Physical Characteristics of Homo erectus

Answer 4

Skull is long, low, and thickly walled, with a flat frontal area and prominent browridges. The brain, averaging 895–1,040 cc.

Question 5

Homo floresiensis

Answer 5

Distinct species that is closely related to Homo erectus.

Tiny, small brains, but structure is closely related to H. erctus.