23s - Primates Primate Evolution • Holocene First...

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Primates A specialized group of large-brained mammals, appear in the Paleocene Grasping forelimbs Nails instead of claws Large eyes with stereoscopic vision Brains large for body size Plesiadapids - earliest primate-like animals (Paleocene) Not strongly specialized, small in size, small eyes Looked like large rodents, with teeth adapted for cropping May not have given rise to any living primates, but were closely related and share a common ancestor with living primate groups Purgatorius Primates First “true” primates appear in the Eocene Paleocene Eocene Oligocene Miocene Pliocene Pleistocene Holocene 65 Ma 54.8 Ma 33.7 Ma 23.8 Ma 5.3 Ma 1.8 Ma 11 ka Q Tertiary Adapids and Omomyids Early primates of the Paleocene-Eocene looked much like modern lemurs and tarsiers Adapids Diacronus (China) Similar to a modern lemur Omomyids Eosimias (China) Very tarsier-like, about the size of a pygmy marmoset Tarsier Lemurs Marmoset Primate Relations Plesiadapids
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This note was uploaded on 10/24/2009 for the course ANTH 171 taught by Professor Franciswhite during the Spring '09 term at Oregon.

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23s - Primates Primate Evolution • Holocene First...

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