ANTHROP 3300 Chapter Notes - Chapter 8: Australopithecus Afarensis, Neanderthal, Homo Rudolfensis
20 Aug 2016
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Examining teeth to determine age: mann"s findings. Long maturational periods had already evolved in pliocene: b. holly smith"s findings hominins older than a. robustus. Aged all teeth separately for each fossil jaw studied. Only robust australopiths followed human-like pattern: sapiens = permanent central incisors and first molars erupt with little time between. Apes = eruption of first permanent incisors is often delayed more than 2. 5 years after the first molars erupt. Developing teeth needed to determine never been clearly visualized by conventional radiographic techniques. High-resolution ct scans showed patterns of dental development differed between a. robustus and a. africanus: different methods. Cross striations daily microscopic increments of enamel. Striae of retzius or perikymata near weekly increments of enamel. C. 1. c: africanus, a. afarensis and early homo = none have as great a total number of perikymata on surface of tooth as modern humans.
