INTEGBI 35AC Lecture : Class 4 - Primate Evolution
23 Oct 2013
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Mammals: homiothermy, heterodontism, lactation, internal gestation: 1st mammal: hadrocardium, 4 types of mammals: montremes, marsupials, placentals, ___, closest connectiom: dermopterans. Pangea split: dinosaurs got extinct, 66 million years ago comet. Know time periods: cenezoic and stuff. Climate changes: need time to adapt in rapid change. Paleocene (: mammals from era: purgatories, 30% of fossils. Eocene (55-34 mya: got really warm, really fast, cooled off gradually, lemur things hopped across the continents. Oligocene: you are an ape, less forest, north america and europe separate, el fayum, egypt = forest. Yay africa: lots of apes, ~18, best known: proconsul 4 species, long limbs, no tail, walk on 4 limbs. Apes today: gibbons (15 mya), orangutans (11 mya), gorillas (7 mya), chimps/bonobos (6 mya), humans, look at last common ancestor to see derived and primitive traits. Hominidae: large bipedal apes, lots of pair bonding, chimps, bonobos, humans, genuses show more specific traits within adaptive regime, more specific.
