ANT 100 October 11th 2012.docx

17 views4 pages
22 Nov 2012
ANT 100 October 11th 2012
Lecture 4: Primate & Early Human Evolution
Lecture goals
- General patterns of morphology and phylogenetics for fossil primates
- What a hominin is in terms of taxonomy
- Morphological trends in hominin evolution:
- Bipedalism
- Expansion in brain size
- Changes in dental/cranial
Time frame and climate: On a continuous decrease in temperature from the Paleocene period .
Paleocene “Primates”
- Geography and climate
- Very different from present-day conditions
- Hotter, more humid
Paleocene and primate-like mammals: Plesiadapiformes
- Body size: tiny, shrew sized to size of small dog
- Niche: Likely solitary, nocturnal quadrupeds; well-developed sense of smell
- Diet: insects and seeds
- Used to be classified as primates because of primate-like teeth and limbs that are adapted for
arboreal lifestyle
Recent: Plesiadapids NOT primates
1) No postorbital bar,
2) 2) claws instead of nails,
3) Eyes placed on side of head, &
4) Enlarged incisors.
Two main Eocene Primate: Families
1) Adapidae
- Body size: 100g to 6900g
- Diurnal and nocturnal forms
- Mainly arboreal quadrupeds, some may have been specialized leapers
- Smaller adapids ate mostly fruit and insects, larger forms ate more fruit and leaves
- Led to lemurs??
Unlock document

This preview shows page 1 of the document.
Unlock all 4 pages and 3 million more documents.

Already have an account? Log in

Get OneClass Notes+

Unlimited access to class notes and textbook notes.

YearlyBest Value
75% OFF
$8 USD/m
$30 USD/m
You will be charged $96 USD upfront and auto renewed at the end of each cycle. You may cancel anytime under Payment Settings. For more information, see our Terms and Privacy.
Payments are encrypted using 256-bit SSL. Powered by Stripe.