8.Austral

8.Austral - Hominids When and Where Did the First Hominids...

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Unformatted text preview: Hominids When and Where Did the First Hominids Appear, and What Were They Like? What is the Relation Between the Various Forms of Australopithecus? Why Had Australopithecus Become a Bipedal Walker? Time line for hominid fossils A. anamensis 4.2-3.9 mya A. afarensis 3.9-3.0 mya A. africanus 3.0-2.3 mya A. boisei (Zinj) 2.0 mya A. robustus 1.8-1.0 mya Homo habilis 2.4-1.6 mya Black skull & 1470 - 630-775 cc brain Homo erectus 1.8 - 200,000 Homo neanderthalensis 300,000-35,000 Homo sapiens 50,000 - today Early primates Paleocene Eocene Oligocene Miocene Pliocene 55 65 34 23 5 QuickTimeª and a TIFF (LZW) decompressor are needed to see this picture. Ardipithecus ramidus Dated at 4.4 million years old, oldest collection of hominids discovered. More apelike than Australopithecus anamensis Hominid-like canine and vertebral elements Forward position of foramen magnum Suggesting bipedal locomotion on ground The remains provide anatomical evidence of bipedalism. Australopithecus Originally discovered in southern Africa Hundreds of fossils have now been found Existed between 4.2 and 1 million years ago Five different species: A. anamensis A. afarensis A. africanus A. boisei A. robustus Australopithecine sites Taung=1st 1924 Raymond Dart A. africanus Numerous fossils that date 3 to 2.3 mya Australopithecus anamensis 4.2 to 3.9 mya Time line for hominid fossils A. anamensis 4.2-3.9 mya A. afarensis 3.9-3.0 mya A. africanus 3.0-2.3 mya A. boisei (Zinj) 2.0 mya A. robustus 1.8-1.0 mya Homo habilis 2.4-1.6 mya Black skull & 1470 - 630-775 cc brain Homo erectus 1.8 - 200,000 Homo neanderthalensis 300,000-35,000 Homo sapiens 50,000 - today Australopithecus anamensis 4.2 to 3.9 million years ago Oldest direct evidence for bipedalism More apelike jaw Australopithecus afarensis 3.9-3.0 mya Time line for hominid fossils A. anamensis 4.2-3.9 mya A. afarensis 3.9-3.0 mya A. africanus 3.0-2.3 mya A. boisei (Zinj) 2.0 mya A. robustus 1.8-1.0 myaA....
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This note was uploaded on 03/31/2009 for the course BAA 1219 taught by Professor Glander during the Fall '08 term at Duke.

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8.Austral - Hominids When and Where Did the First Hominids...

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