Early Primates 2 2010

Early Primates 2 2010 - Overview of Primate Beginnings 65...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Overview of Primate Beginnings 65 mya, asteroid hits earth Dinosaurs are wiped out Marks the beginning of the Cenozoic Era At this time, continents are still moving
Background image of page 1

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

View Full DocumentRight Arrow Icon
First epoch in the Cenozoic Era is the Paleocene 65-53 mya archaic primates – unsure whether or not primates Plesiadapiforms are primatelike mammals Recovered from North America, Europe, Asia – that is, from Laurasia Mostly have found teeth and some skulls
Background image of page 2
Small brains, prognathic face, small eye sockets on the sides rather than front of head, no postorbital bar, and many have rodent-like incisors separated from the molars by a large diastema . Some have claws and lack an opposable big toe. Range in size from mouse to cat Plesiadapiforms
Background image of page 3

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

View Full DocumentRight Arrow Icon
Compare archaic primates to prosimians Plesiadapiforms Prosimians Lack postorbital bar Have postorbital bar Eyes face out to side Eyes don’t face quite so far to side, more forward Have rodent-like incisors Have dental comb incisors Have diastema (gap) No gap between incisors between incisors and and canines canines Smaller brain Slightly bigger brain Some have only claws Nails, only grooming claws
Background image of page 4
Compare prosimians to anthropoids Prosimians Anthropoids BOTH have prehensile, pentadactyl hands/feet BOTH have clavicles, postorbital bars Some degree of Stereoscopic vision stereoscopic vision, no color Color vision Eyes face a bit out to sides Eyes face forward Eye sockets not all enclosed Eye sockets enclosed by bone Nails, and grooming claws Nails, tactile pads Expanded brain More emphasis on smell Emphasis on sight Little sexual dimorphism Have sexual dimorphism
Background image of page 5

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

View Full DocumentRight Arrow Icon
Earliest UNDISPUTED primates found Eocene, 53-36 mya The fact that we have two superfamilies indicates the preceeding Paleocene archaic primates probably were primates
Background image of page 6
Eocene, continued 53-36 mya Two main superfamilies of primates
Background image of page 7

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

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/04/2011 for the course ANTH 101 taught by Professor Simmons during the Spring '06 term at South Carolina.

Page1 / 26

Early Primates 2 2010 - Overview of Primate Beginnings 65...

This preview shows document pages 1 - 8. Sign up to view the full document.

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