Mar26-post - Lecture 32 March 26 Discussion Activity...

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1 Lecture 32: March 26 Terrestrial Diversification: Highlights of Vertebrate Evolution Origin of Chordates - phylogeny & fossils - defining features • Origin of Fishes - vertebrae, jaws, lungs • Origin of Tetrapods - phylogeny & fossils - limbs, later amniotic egg • Origin of Birds - feathers & flight • Origin of Mammals - hair, mammary glands, placenta Discussion Activity None this week Articles on human evolution for Friday’s lecture (week 12 folder) Check Qwizdom Points on SAMS https://cats.lsa.umich.edu/ I will finish up 1 slide from lecture 31 Chapters 33 : 749-762, 765, 770 Is there any evidence that interactions between insect species and angiosperm species resulted in coevolution? How would you test this idea? Farrell 1998 performs such a test data on next slide… Adaptive Diversification? repeated origin of angiosperm-feeding beetle lineages associated with enhanced rates of beetle diversification, indicating a series of adaptive radiations Farrell 1998 Science 281:555-559 There are 3 phyla of Deuterostomes: Encinoderms: sea stars, brittle stars, urchins, sea cucumbers, sand dollars, crinoids Hemichordates: acorn worms (suspension feeders) Chordates: sea squirts, lancelets, cartilaginous and bony fishes, lobe-finned fishes, amphibians, reptiles, birds, mammals embryos of all these groups develop in the
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