Australopithecines Continued

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Australopithecines Continued


Continues the lecture on gracile australopithecines and covers the robust australopithecines, finishing the australopithecine lectures

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University of Missouri
Anthro 2050 - Introduction to Biological Anthropology With Laboratory
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Anthro2050 1st Edition Lecture 27 Outline of Last Lecture I. Intro to Australopithecines II. Gracile Australopithecines Outline of Current Lecture I. Gracile Australopithecines Continued II. Robust Australopithecines Current Lecture Gracile Australopithecines Continued: -valgus angle and a wider pelvis indicate bipedality. -foot has a combination of human-like features and ape-like features. The big toe is like a human's, but the phalanges are curved like an ape -Laetoli, Tanzania. A. afarensis footprints left in volcanic ash. 3.6 million years ago. Two sets of foot prints, a man and woman most likely, with indication of the woman carrying something, likely an infant. -body proportions: long arms, femur short compared to the humerus -high sexual dimorphism. 3 1/2 to 5 ft tall, 64-99 pounds. 1.6 ratio between male and female body size (the ratio is 2 for apes and 1.3 for humans) Robust Australopithecines: -large teeth and a heavy built cranium -direct offshoot from the gracile australopithecines, approximately 2.5 million years ago. Unique features that suggest heavy and difficult chewing was needed. -brain size approximately that of gracile australopithecines. -clearly bipedal as well -long, flatter faces, with big, wide cheek bones. These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.

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