ANT 131 Study Guide - Final Guide: Upper Paleolithic, Klasies River Caves, Cranial Vault
Document Summary
Brow ridge expressed more clearly in males. Typically less robust", more gracile, then recent ancestors. Summarized into 2 contrasting views: regional continuity model, replacement model. Regional continuity model | local populations in europe, asia, africa continued their indigenous evolutionary development from pre-modern middle pleistocene forms to amh. No taxonomic differences between modern and premodern humans: all hominins following h. erectus become h. sapiens. Local populations would not have evolved totally independently of one another: mixing maintains single human species with polytypic traits. How do amh arise separately, yet still have similar physical/genetic traits: denies that earliest modern h. sapiens originated exclusively in africa, significant levels of gene flow (migration) between populations were likely. Replacement model | says that all modern humans first evolved in africa and then dispersed across the world and replaced other hominins. Complete replacement: amh arose in african within the last 200,000 years and then migrated from africa. Migrated african h. sapiens could not have interbred with local non-african species.
