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Life in the Mesozoic (cont.)

Life in the Mesozoic (cont.). The Age of Dinosaurs. Saurischia “Reptile-Hipped Dinosaurs”. Sauropods (Herbivores) Theropods (Carnivores) Aves (Birds). Sauropods. Seismosaurus. Sauropods. Barapasaurus. Sauropods. apatosaurus. Theropods. Tyrannosaurus. Theropods. Velociraptor.

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Life in the Mesozoic (cont.)

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  1. Life in the Mesozoic (cont.) The Age of Dinosaurs

  2. Saurischia“Reptile-Hipped Dinosaurs” • Sauropods (Herbivores) • Theropods (Carnivores) • Aves (Birds)

  3. Sauropods Seismosaurus

  4. Sauropods Barapasaurus

  5. Sauropods apatosaurus

  6. Theropods Tyrannosaurus

  7. Theropods Velociraptor

  8. Theropods allosaurus

  9. Small Theropods Compsognathus

  10. How do we know about Dinosaur Behavior?

  11. Dino Nests

  12. Dinosaur Trackways

  13. How do we know about Dinosaur Color and Soft “Stuff”?

  14. Skin Imprints Triceratops

  15. Brain Casts & Gizzard Stones

  16. Color? Ceratosaurus

  17. Warm vs. Cold Blood(Endotherms vs. Ectotherms)

  18. Predator/Prey Ratios

  19. Bone Structure

  20. Upright Posture & Fast Speeds

  21. Problems - Food & Heat Loss

  22. Bottom Line Some dinosaurs were endotherms (small theropods) and others were ectotherms (large sauropods)

  23. Adapting to the Skies

  24. First in Flight - Pennsylvanian Cretaceous dragonfly

  25. Meganeura monyi(roughly to scale) The largest insect in history More to come in the Mesozoic…

  26. Second - The Flying Reptiles Pterosaurs Criorhynchus

  27. Pterosaurs Pteranodon

  28. Pterosaurs:Pterodaustro

  29. Third - First Birds (Aves) Jurassic

  30. archaeopteryx

  31. Share Characteristics with Theropods Deinonychus

  32. Caudipteryx

  33. Feathered Dinosaurs Dilong paradoxus

  34. Last…Mammals (Cenozoic) Bats

  35. Mesozoic Mammals Dinosaurs & Birds Pterosaurs Crocodiles Lizards & Snakes Synapsids (Mammals) Archosaurs Marine Reptiles Anapsids (Turtles) Diapsids

  36. Triassic - Lystrosaurus

  37. Mammals vs. Reptiles Development of jaw and ear bones Secondary palate Teeth differentiate Evidence for warm-blood

  38. Mesozoic Mammal Teeth

  39. Cynodonts (Triassic)

  40. Small Insectivores

  41. Mesozoic Mammals: Bigger than previously thought Repenomamus More with the Cenozoic…

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