ANTHR-140 Lecture Notes - Lecture 13: Paranthropus, Pelvis, Laetoli
15 Jun 2020
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Social factors: ability to provision for family in context of evolution. Able to carry and transport tools, food, or infants. Ecological factors: savannah theory- want less body exposed to sun. 4 possible locations of earliest hominins": sahelanthropus tchadensis. Dentition shoes mixed evidence: no c-p3, u-shaped dental arcade. Biped: postcrania is missing but believe foreman magnum is directly below a skull. Likely not a hominin: omorin tugenensis. No likely a hominin ardipithecus- evolution"s bad girl: kadaba. Kadaba could be ancestor of ramidus: ramidus. Reduced canine, no cp3, less sexual dimorphism. Pelvis is different mosaic of bipedal and climbing traits, short and broad ilium. Lacks adaptation of knuckle walking and suspensory locomotion. Dentition: reduced canine size, larger cheek teeth, thicker enamel locomotion/ posture is bipedal. Brain size- not substantially enlarged compared to apes. Body size is smaller than modern human with more sexuail dimorphism. A. are more gracil and paranthropus more robust. Gracile forms also found in central africa.
