Human History

Human History - Early Man Primate groups Prosimmii Tree...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Early Man Primate groups • Prosimmii – Tree shrews, lemurs, tarsiers • Often nocturnal • Anthropoidea – Monkeys, apes, humans Prosimii & Anthropoidea Earliest primates -Prosimian • The earliest relatives of the primates were found in the Mesozoic and are similar to lemurs. Anthropoidea • Monkeys are the most primitive members of this group. • Ceboidea –New World Monkeys – More primitive, prehensile tail – First fossils from Oligocene • Cercopthecoidea –Old world Monkeys – ~7myr ago DNA divergence Old & New World Monkeys
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 The earliest true apes • Found in the Oligocene from Egypt. While this is a desert area now, in the Oligocene it was part of the fertile Nile Valley, covered by a tropical forest. • The apes of Oligocene and Miocene were arboreal fruit eaters. • By the end of the Miocene at least 2 lineages of apes spent part of their time in open country Eocene primate Trends since Eocene (55-37 myr ago) • Muzzle shortening • Increase in brain • Claws to nails • Forward placement of eyes • Decrease in tail length • Grasping big toe Recent Anthropoids Early Anthropoids • Split away from Prosimians in Oligocene. Aegyptopithecus zuexis Since Miocene. . • DNA evidence indicates that the orangutan and man diverged 10-11myr ago. • African apes and man diverged in the Miocene. • The earliest known hominid fossil is just younger than ~7myr old. . Sahelanthropus tchadensis
Background image of page 2
3 Sahelanthropus tchadensis Miocene • Important epoch in human evolution. • Plate tectonics was involved. • Climate was involved as well • Both Pongids and Hominids evolved at this time. Family tree
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/23/2012 for the course GEOL 102 taught by Professor Kysar during the Spring '06 term at George Mason.

Page1 / 10

Human History - Early Man Primate groups Prosimmii Tree...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online