The Usurpers

The Usurpers - bipedal • Thick enamel • Contender •...

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The Usurpers
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Australopithecines Oldest hominids 4.4 mya ‘man-apes’ Dimorphic Bipedal
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Evolutionary Landmarks Australopithecine Locomotion Brain cc Dentition Culture Bipedal -femur, pelvis, skull 410 - 530 Lg posterior Sm anterior Butchered bones Termite sticks
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Lucy
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Australopithecus afarensis Hadar, Ethiopia 3.6 - 3.0 mya Don Johanson 1974 40% skeleton Bipedal Ape cranium Bipedalism first Lucy
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Sahelanthropus tchadensis Chad, Central Africa, 2001 Forest, grass 6-7 mya
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Sahelanthropus tchadensis Ape 320 – 380 cc (ape) No PC Biostratigraphy Human Flat face Foramen magnum Nonhoning, small canine
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Orrorin tugenensis, 2000 Tugen Hills, Kenya ‘Original’ man Forest 6 mya
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Orrorin tugenensis Human Femoral neck
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Unformatted text preview: bipedal • Thick enamel • Contender? • And Lucy? • Australopithecine? Dental – Small molars – Canine wear Orrorin vs. Lucy Ardipithecus ramidus 1992 • 5.8-5.2 mya • Middle Awash, Ethiopia • 50 individuals • 50% skeleton • Wet & wooded Ardipithecus ramidus Human • Bipedal – Foramen magnum – nonhoning Ape • Thin enamel • Small skull • Toes, fingers Summary Pre-australopithecines • Best earliest biped: Orronin 6 mya • Ape-like dentitions • Not just Rift • Not savannah Evolutionary Landmarks Pre-australopithecine: 7-4.4 mya Locomotio n Brain cc Dentition Culture Bipedal-femur 350cc Canine Reduction, wear No evidence Why bipedal?...
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The Usurpers - bipedal • Thick enamel • Contender •...

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