ZOO 2090 Lecture Notes - Lecture 15: Australopithecus Anamensis, Boreoeutheria, Archonta

• School: University of Guelph
• Department: Zoology
• Course: ZOO 2090
• Professor: Fred Laberge

Document Summary

Important points discuss primate evolution and the origin of modern humans extant primates and their characteristics trends in primate and human evolution. Boreoeutheria: primates form archonta grouped with extant scandentia (tree shrews) and dermoptera (flying lemurs) to plesiadapiformes thought to be closest relatives (extinct: plesiadapis (extinct, early eocene, squirrel-like tree climber that possessed grasping hands. : lemurs, lorises, galgos, tarsiers (radiation in palaeocene and eocene. : new world (prehensile tail, flat nose) and old world (non-prehensile tail, Apes (hominoids) no tails, large braincase, mobile shoulder joint allowing arm rotation in complete circle origins in africa (early miocene/oligocene) Praeanthropus afarensis (2. 9-3. 6 mya) overlap) (red = australopiths, blue = many species show 2-1. 5mya. First humans: sahelanthropus (~6mya): similar to chimps in brain size, orrorin (~6mya): incomplete fossils, ardipithecus (~5. 6 - 4. 4mya): forwards foramen magnum (biped) Preanthropus (extinct: preanthropus anamensis (4. 1 - 3. 9 mya, preanthropus afarensis (3. 6 - 2. 9 mya); lucy: brain size bigger, ape-like characters but could stand upright (hipjoint)