Comparison of 3 Australopithecines Essay example

891 Words Nov 6th, 2011 4 Pages
Kourtney Baley
Professor Marcom
Anthropology 2:30-3:50
April 17, 2011
A Comparison of Three Australopithecines

Just to make it fair for all readers , the Australopithecus is the genus of Pliocene and Pleistocene hominids. A major characteristic of a hominid is bipedal locomotion or walking upright on two legs. Several types of Australopithecines have been found but all lived Africa mostly east Africa about four million years ago. The Australopithecus is the first definite hominid but they all slightly differ in their features. All species of the Australopithecus can be split into either a gracile or robust australopithecine. The gracile group consists of species with smaller dentition and lighter facial features and includes the
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The Boisei only seemed to eat the unfavorable foods whenever they were forced into a dry open environment
“The idea is that P. robustus ‘‘fell back’’ on less preferred, mechanically challenging items at times of resource stress when preferred foods were unavailable, much like modern-day lowland gorillas do with tough foods” ( Unger2).
Many scientists today do not believe that the Australopithecus boisei is an ancestor to modern humans like the Gracile Australopithecines.
The gracile Australopithecines are much smaller and not so bulky as the Australopithecines robustus. To describe any of the different species of the gracile australopithecine's compared to the australopithecus boisei one would include a smaller dentition and lighter facial and dental muscles than the robust. Many scientists believe that the gracile australopithecines are direct evolutionary ancestors. Which concludes that a main differentiating point of comparing the two gracile compared to the robust is that they are more directly related to modern-day humans.
The gracile, australopithecus africanus lived between three to two million years ago primarily in southern africa during the Pliocene period. The africcanus lived in a semiarid climate very similar to the climate today. The australpithecus africanus was small with a height ranging from about three and a half to four and a half feet tall, and a weight from sixty to ninety pounds. Like humans the Australpithecus africanus is
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