Class Notes (838,800)
Canada (511,100)
Anthropology (2,038)
ANT101H5 (475)
Lecture

Detailed Lecture Notes Chapter 9

5 Pages
183 Views
Unlock Document

Department
Anthropology
Course
ANT101H5
Professor
Heather Miller
Semester
Winter

Description
Chapter 9 Lecture Early Primate Evolution Eocene – 56-34/33 mya  Eo = first, earliest  1 primates  Prosimian Radiation o Radiation means that species that diversifies into a diversity of niches o Lemurs and loires ancestors  1 Anthropoids o Ancestors of monkeys, apes an humans Oligocene – 33-23 mya  Anthropoid Radiation o Lots of different kinds of monkeys, apes and humans (ancestors not modern)  Start to see a lot more animal species that are more like anthropoids Miocene – 23-5 mya  1 Hominoids o Ancestor of apes and human (and all extinct human ancestors)  Hominoid Radiation o Wide diversity these kinds of animals that fossil apes and humans would have done  Main points are on page 202  Hominoids include the apes  Figure 9-3  Figure 9-4 Miocene Hominoid Distribution o Only in the Old World  They are hominoids  More closely related to the hominins than old World monkeys  Chimp size or bigger  larger body (trend for the primates)  Most of them are so derived, that they are specialized into an adaptive niche  We haven’t found the most direct ancestors for the hominoids  EXCEPTION: celopithicus might be the ancestor for the organatang Hominin Evolution Overview  We are interested in our direct ancestors, hominins o Apes are not included Hominin vs. Hominid  Figure 9-8b  Ancestry is more complicated (as you can see in the lower chart)  Hominids refer to a larger group, while hominins are our species Mosaic Evolution - Figure 9.7 is a really good summary - Mosaic Evolution = little pieces are added to make a whole picture - The earliest hominins are approx. 5 mya (based on fossil evidence)  Bipedal Locomotion o Remains the number one classification trait for hominin o Clear evidence of bipedal adaptation was from 4 mya  Brain – encephalization o Is a gradual process o Overall trend is for the size to increase (not the brain, but different parts of the brain gets bigger) o Take off after around 2 mya o **Encephalization = brain to body size ratio  increases greatly overtime  Dentition o All hominins overtime actually have their front teeth decrease in time o We do not have big canines and incisors  our teeth are relatively the same size o True from 1 mya  Cultural behavior (seen via tools) o Very imporant for hominins o Shows a gradual increase through time Biocultural Evolution  Process of biocultural evolution  Hominins are clearly bioculturally adapting Bipedalism Hominin Bipedalism –Habitual and Obligate  Hominin bipedalism is definitional  Habitual o Do it all the time, favorite means of locomotion o Standard and most efficient locomotion  Obligate o An animal is committed to bipedalism  All the hominins that are 4 mya to present are clearly habitual and obligate bipeds  ADVANTAGES: Much more efficient long term walker, can see farther away, and carry things in y
More Less

Related notes for ANT101H5

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit