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

2. Saurischia “Reptile-Hipped Dinosaurs” 1.Sauropods (Herbivores) 2.Theropods (Carnivores) Aves (Birds)

3. Sauropods Seismosaurus

4. Sauropods Barapasaurus

5. Sauropods apatosaurus

6. Theropods Tyrannosaurus

7. Velociraptor Theropods

8. allosaurus Theropods

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

36. Triassic - Lystrosaurus

37. Mammals vs. Reptiles 1.Development of jaw and ear bones 2.Secondary palate 3.Teeth differentiate 4.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…