ANTH 1 Lecture Notes - Lecture 16: Postorbital Bar, Omomyidae, Thumb
18 May 2020
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Name of fossil remains found in wyoming. Based on preliminary evidence, there was thought to have been enough evidence to classify it as a primate. Over time, researchers came to believe that plesiadapiforms are thought to precede the appearance of primates. They are more primate-like mammals, not true primates. Huge environmental change at the onset of the eocene. As primates are/were more generally adapted, they were able to survive. Group of primates, dating to the eocene, that display true primate characteristics. A - probably the most widely distributed primate of the eocene (found in both north africa and europe) B- probably the most generalized of the eocene primates. Due to a and b, it is probably most responsible for the ancestral base of the more derived primates that would follow. 1) they have a complete post-orbital bar (protection of the eye socket) 2) they have a larger, more rounded brain case (heightened reliance on sight) and smaller nose.
