Anthropology #10 - Anthro Lecture #10: Primate Evolution...

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Anthro Lecture #10: Primate Evolution Major Epochs during Tertiary Period: 1. Paleocene “Primates” Geography and climate Very different from present-day conditions Hotter, more humid Body Size: tiny, shrew-sized to size of small dog (small body= small insects) Niche: Likely solitary, nocturnal quadrupeds; well-developed sense of smell (job) Diet: Used to be classified as primates because of primate-like teeth & limbs that are adapted for arboreal lifestyle When first discovered where thought o be first primates ever, from where we descended , until early 1960’s Recent: Plesiadapids NOT Primates: 1. No postorbital bar 2. Claws instead of nails, (class attached to bone, nails reside in soft tissue bed) - Primitive (similar to early ancestral condition) 3. 4. Enlarged incisors Based on these factors these are NOT Primates Cladistic analysis: Primates may have been around when Dino’s walked the earth controversial 2. It wasn’t as hot as the Paleocene Decline in world temperature When temperatures cool, ice masses cforms: world gets dryer, oceans shrink and plants don’t grow as well Two Main Eocene Primate Families 1) Adapidea Body size: 100g to 6900g Mainly arboreal quadrupeds, some may have been specialized leapers (hind limbs allowing them to jump) Smaller adapids ate mostly fruit & insects, larger forms ate more fruit &
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Anthropology #10 - Anthro Lecture #10: Primate Evolution...

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