ARCL-1006EL Lecture Notes - Lecture 14: Jebel Irhoud, Klasies River Caves, Homo Erectus
16 Jun 2018
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ARCL 1006!
March 18, 2018!
Life after Homo erectus: Homo ļ¬oresiensis, the Denisovans, Neanderthals and modern Homo
sapiens!
ā¢Hominins!
ā¢Homo erectus- 1.8 mya to 300 ka!
ā¢Neanderthals- 400 ka to 40 ka!
ā¢Denisovans- 125 ka to 40 ka!
ā¢Homo ļ¬oresiensis- 100 ka to 50 ka!
ā¢Homo sapiens- 300 ka to present!
ā¢We have a chin,!
ā¢Small teeth and job!
ā¢Head is a funny shape- our cranium is a globular shape !
ā¢Missing brow ridges !
ā¢Big brain!
ā¢Location of early anatomically modern homo sapiens: Herto, Ethiopia and Skhul,
Qafzeh (Israel) and Klasies River Mouth (South Africa), Jebel Irhoud,
Morocco(transitional to modern homo sapiens)!
ā¢Model 1 (multi regional hypothesis)!
ā¢In each one of these regions, you had the evolution of homo Erectus through some
archaic (neanderthals) thing, into modern homo sapiens!
ā¢Basically Neanderthals(Europe) evolved into modern homo sapiens in the region they
existed !
ā¢Evidence is from fossils !
ā¢If the multi-regional hypothesis is correct, what assumptions must be true regarding homo
populations during the Pleistocene?!
ā¢Nature of populations during the Pleistocene !
ā¢There has t have been continuous gene ļ¬ow- NO ISOLATING MECHANISMS!
ā¢The homo Erectus populations around the world would have had t be interbreeding with
one another this entire time!
ā¢Model 2 āeve hypothesisā // āout of africaā !
ā¢Challenged model one, over 20 years ago!
ā¢Based on genetic evidence- by studying mitochondrial DNA!
ā¢African homo erectus evolved and eventually caused the extinction of Europe and Asia
archaics!
