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my final guide - Early Hominid Evolution Fossil...

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Early Hominid Evolution Fossil Record (fossils - time, locations, distinctive features) Sahelaththropus Tchadensis (5.2 -7 mya – Late Miocene) Africa - Chad Less prognathic than expected, smaller canines, small brain size, U-Dental Orrorin Tugenesis (6 mya – Late Miocene) Africa – Kenya Small teeth, large canines, not sure if it’s truly hominid Ardipithecus Kadabba (5.7 mya) Africa – Ethiopia Large canines Ardipithecus Ramidus (4.4 mya) Africa – Ethiopia Smaller canines, arm anatomy was seen in bipeds and quadrapeds Australopithecus Anamensis (4.2 mya) Africa - Kenya Biped for sure, teeth and jaws more primitive, U-Dental, thick enamel Australopithecus aferensis (lucy) (3.5 mya) Africa – Ethiopia Human + ape features, more complete skeleton, bi-pedal Australopithecus Bahrelghazali (3.5-3 mya) West Africa Front mandible with Seven teeth Kenyanthropus Platyops (3.5 mya) Kenya Flat faced, small molar teeth Australopithecus Garhi (2.5 mya) Middle Awash – Ethiopia Prognathic face, large canines, sagittal crest. Australopithecus Africanus (3.5-2 mya, Pliocene) Southern Africa Foreman magnum in the center, link between small and large brain apes Piltdown Man – Hoax Australopithecus Aethiopicus (2.7-2.5 mya) Ethiopia – Lake Turkana Sagittal crest, dished face, huge molars Australopithecus Boisei (2.3 -1.2 mya) East Africa Large post cranial skeleton Australopithecus robustus (2.0-1.5 mya) South Africa Ate tough foods and animal protein
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Is hominid evolution a linear process? Why or why not? It is not a linear process. There were many different species that mated together and many species that completely went extinct. Are the “pre-australopithecines” unequivocally hominids? Why or why not? Yes because though they were more similar to apes, being small bodied and small brained with prognathic faces, they still walked bipedally. What negative impacts did the “discovery” of the “Piltdown man” have on subsequent fossil discoveries (e.g., Taung child)? Scientist would not believe that humans were from Africa because of the Piltdown man.
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