Lecture 7, Vert LIfe

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1. Locomoter superiority hypothesis

  • flying things do better than terrestrial animals
  • competitive replacement of sprawling therapsids with upright pseudosuchians due to carriers constraignt
  • loss of archosaurs due to therapsids
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2. Ornithodira

  • Bird line of archosaurs - some lightly built bipeds, some carnvorus some herbivorus groups, often insultaed endoderms, more ecologically balanced
  • Crocodile line of archosaurs - heavily built quadropeds, large heads, short necks, carnivorus, amoured scutes, semi-aquatic ectothermic poikilotherms

3. ornithischia

  • ornithodira
  • pseudosuchia

4. rauisuchidae

  • pseudosuchia
  • ornithodira

5. Aetosauria

  • pseudosuchia
  • ornithodira
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