ANTH 1102 1ST Edition Lecture 10 Outline of Last Lecture I Trends Important in Hominin Evolution a Molecular Clock II III IV Fossil Records a The Afar b Lucy c Earliest Ancestor Evidence of Bipedalism a Brain Size b Stone Tools Environmental Factors Associated with Traits a Rainforest Depletion b Radical African Climate Change Outline of Current Lecture V Timeline of Hominin Evolution VI Apes that Lived During Miocene VII VIII First Apes We Think Were Bipedal a Comparison of Human and Chimp Brain Pliocene a 3 Hominin Genera Current Lecture The Timeline of Hominin Macroevolution MYA MILLION YEARS AGO Timeline of Hominin Evolution Miocene 24 5 3 million years ago Diversity of apes First bipedal ape Hominins 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 Pliocene 5 3 2 5 million years ago Pleistocene 2 5 million years ago 12 thousands of years ago Increasing brain size and complexity Modern humans and peopling of the world Apes that Lived During Miocene 24 MYA TO 5 3 MYA FLASHCARDS ON ELC Nakalipithecus Kenya Sivapithecus Bipedal ape Hominin diversity India Nepal Pakistan Dryopithecus 10 MYA Small palm walker Africa Gigantopithecus Frugivore Knuckle walker China Vietnam North India First Apes We Think Were Bipedal Sahelanthropus tchadensis otherwise known as Toumai 6 7 MYA Orrorin tugeninsis 6 MYA Bipedalism found by femoral neck Comparison of Chimp vs Human Brain Size H sapiens Volume 1300 cc EQ 7 6 cc cranial capacity cubic centimeters EQ encephalization quotient estimate of intelligence P troglodytes Volume 330 cc EQ 2 4 Pliocene 5 3 MYA to 2 5 MYA At least 3 Hominin Genera Australopithecus Ardipithecus Kenyanthropus Australopithecus gracile Gracile slender narrow body form 3 9 to 2 MYA A africanus Taung Child A afarensis Lucy Selam 400 cc still chimp ish size brain Laetoli Footprints o 3 6 MYA o Tanzania o Portrayed in a human way o Couple walking side by side Ardipithecus 4 4 MYA 325 cc A ramidus Ardi Kenyanthropus platyops 3 5 MYA Means Flat Faced had a flat nose and high cheekbones These Hominins are not known to what degree they are like humans Not ancestor species In terms of brain size the brain remains relatively constant during Pliocene Remember ways to tell bipedalism Foramen Magnum Femoral Neck Pelvis Shape Femur and Pelvis articulation Knock Knees
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