1. CHAPTER 12 LIFE OF THE PALEOZOIC

2. f10_01_pg268

3. Paleozoic Animals

4. Marine Invertebrates

5. t12_01_pg328

6. Animals With Shells

7. f12_21_pg337

8. f12_45_pg349

9. f12_40e_pg347

10. f_pg326

11. Anomalocaris

12. Paleozoic Life

14. FISHES

15. Fishes – 5 Groups Ostracoderms – End of Cambrian –Jawless Placoderms – Silurian –Plate Skinned Acanthodians – Silurian –Non-armored jawed Osteichthyes – Devonian –Bony Chondrichthyes – Devonian –Cartilaginous

16. f12_58_pg355 Fish Evolution

17. Living Fossil – Onset Devonian Coelacanth

18. Bony Fish

19. Devonian Shark - Cladoselache Sharks

20. Devonian Placoderm - Dunkleosteus Placoderms

21. Conodont – Valuable Index Fossil

22. Amphibians – “Tetrapods”

25. Amphibians Descended from fish – “Ichthyostega” –Ampibian Group “Labyrinthodonts”

26. f12_73_pg361

27. Movement to Land “Amiotes”

28. Amiotes Egg Laying Animals –Reptiles –Birds –Mammals

29. Reptiles

30. REPTILES

31. Reptiles Earliest Reptiles – Synapsids Pelycosaurs: A member of the Synapsid Family that possessed reptile and mammal characteristics.

32. f12_76_pg363 Pelycosaurs

33. Mammals

34. Descended from Synapsids –Pelycosaurs This group known as Therapsids – –Cynodonts

35. Therapsids Cynodonts Mammal-Like Reptiles

36. PLANTS

37. Paleozoic Plants

40. Crinoids Marine Plants

41. Crinoid

42. Bryophytes (Nonvascular) –Seedless, Spore-Bearing plants –Common in Coal-Forming Plants of Carboniferous. Trachophytes (Vascular) –Gymnosperms –Seed-Producing Pollinating Land Plants

43. Bryophytes Nonvascular Plant

44. Vascular Plant Trachophytes

45. f12_83_pg365 Vascular Plant

46. Early Conifers

47. Paleozoic Extinctions

48. f12_90_pg368 3 Major Extinctions

49. Late Ordovician Extinction Related to Global Cooling 2 Sequences (Regressive & Transgressive) Late Devonian –Eutrophication “Anoxic Conditions” –Continental Glaciation Late Permian

50. Late Devonian Extinction Eutrophication “Anoxic Conditions” Continental Glaciation

51. Late Permian Extinction Global Cooling –Pangea Completed Epicontinental Seas Drained Equatorial Circulation Blocked –Volcanic Activity –Extraterrestrial Cause Asteroid

52. Anoxic Conditions Linked to slowing of ocean circulation, climatic warming and elevated levels of greenhouse gases. Researchers have proposed enhanced volcanism (the release of CO 2 ) as the "central external trigger for euxinia". [5] greenhouse gasesvolcanism [5]

53. THE END