Lecture 16

Lecture 16 - Lecture 16The P-T Extinction and Mesozoic Life...

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Lecture 16- The P-T Extinction and Mesozoic Life Part One A. Carboniferous- Thick, lush forest thrived and so did the animals living in their protection There were elevated levels of oxygen in the seas and atmosphere, life on land took hold and diversified (especially arthropods) B. Diversification of insects- First insect in Devonian o Radiation of winged insects in the late Carboniferous Gigantic dragonflies were flying predators on smaller arthropods, foldable wings evolved in late Carboniferous C. Myriapods- Centipedes+millipeds, HUGE millipedes in carboniferous Synamorphies: many limbs Convergent with insects o Adaption to life on land D. Carboniferous Myriapods- Centipedes were important predators in late Carboniferous Millipedes are still important forest recyclers today, feeding on decaying plant material A relative of the Carboniferous (early) millipede, Arthopleura, reached 7-10 feet long o The gut contents of Arthopleura suggest that it ate the woody central portion of tree
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Lecture 16 - Lecture 16The P-T Extinction and Mesozoic Life...

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