Skull Analysis

Topics: Human, Primate, Australopithecus Pages: 3 (1068 words) Published: March 14, 2013
We were given eight different skulls and we were required to take measurements and notes on each one, such as recording the maximum braincase length or determining if the specimen has a chin. With these detailed notes, we researched various skulls and matched them with the data we have, therefore leaving us with eight indentified skulls. This report will thoroughly discuss what we believe each skull is and why we think so.

Firstly, we believe skull number one is Homo habilis. H. habilis is about 2.4 to 1.5 million years old. This skull has a small supraorbital brow ridge and no sagittal crest. The nasal bones were flat and the facial prognathism is in between. The canines do not jut and a canine diastema is not present. This specimen also had a centered foramen magnum and its facial prognathism was in between. Although the appearance is somewhat apelike, this was the first skull to have a centered foramen magnum, therefore an upright posture. This leads us to believe that it was one of the earlier ancestors of modern humans, the Homo habilis.

Secondly, we believe skull number two is Pan troglodytes, also known as the modern chimpanzee. Pan troglodytes is about one million years old. This specimen has the smallest combined chewing surface and smallest braincase measurements. It did not have a sagittal crest or chin, and the foramen magnum was towards the rear. The facial prognathism was in between and its facial slope was twenty one degrees. These observations lead us to believe that this specimen was a small ape-like creature and it did not walk upright. A modern day chimpanzee seemed to fit these requirements perfectly, which is why we concluded that this skull is Pan troglodytes.

Thirdly, we believe skull number three is Homo sapien. H. sapien is about 200,000 years old to the present day. We believe this is a modern day human because it does not have a canine diastema or a canine jut. The foramen magnum is centered, which means that the specimen will...
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