ANT100Y1 Lecture 3: Thursday, October 5, 2017
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ANT100Y1 Full Course Notes
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Document Summary
Major epochs during tertiary period (mya) millions of year ago. Paleocene (65. 5), eocene (55. 8), oligocene (33. 9), miocene (23. 0), etc. Hotter, more humid (25 degrees celsius avg) Body size: tiny, shrew-sized to size of small gods. Niche: likely solitary, nocturnal quadrupeds; well-developed sense of smell. Classified as primates bc of primate-like teeth and limbs that are adapted for arboreal lifestyle. Recent: plesiadapids not primates (phenetics: no postorbital bar (no bone covering the eye, claws instead of nails (nails are tissues, claws are attached to the bone, eyes placed on side of head, enlarged incisors (buck teeth) North and south america separate, along with antarctica and australia. Massive drop in temperature, tropics becomes less. Mainly arboreal quadrupeds, some were specialized leapers. Smaller adapids ate mostly fruit and insects, larger forms are more fruit and leaves. Body size of 45 g to 2500g. Teeth: adapted for eating insects and soft fruits, only few species were leaf eaters.
