1. CHAPTER 12
LIFE OF THE PALEOZOIC

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3. Paleozoic Animals

4. CHAPTER OUTLINE
Animals With Shells Proliferate — and So Does Preservation
The Cambrian Explosion of Life: Amazing Fossil Sites in Canada and China
The Burgess Shale Fauna
The Chengjang Fauna
Continuing Diversification: Each Creature Found Its Ecological Niche
Protistans: Creatures of a Single Cell
Foraminifera
Radiolaria

5. CHAPTER OUTLINE Marine Invertebrates Populate the Seas
Cup Animals: Archaeocyathids
Sponges: Phylum Porifera
Corals and Other Cnidaria
Moss Animals: Bryozoa
Brachiopods
Mollusks: Clams, Snails, Squid, and Kin
Arthropods: Jointed Bodies and Limbs
Spiny-Skinned Animals: Echinoderms
The Echinoderm-Backbone Connection
Graptolites

6. CHAPTER OUTLINE Advent of the Vertebrates The Rise of Fishes
Agnathids (Jawless Fish)
Evolution of the Jaw
Acanthodians and Placoderms (Fish with Jaws)
Chondrichthyes (Fish with Cartilaginous Skeletons)
Osteichthyes (Fish with Bony Skeletons)
Conodonts: Valuable but Enigmatic Fossils
Advent of Tetrapods
Coming Ashore: First Four-Legged Vertebrates
Amniotes: Reptiles, Birds, and Mammals
Plants of the Paleozoic
Land Plants

7. CHAPTER OUTLINE Mass Extinctions Late Ordovician Extinctions
Late Devonian Extinctions
Late Permian Extinctions — Terrestrial Causes?
Late Permian Extinctions — Extraterrestrial Cause?

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9. Animals With Shells

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TRILOBITES
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14. f12_08_pg7 STRANGE PREDATORS Anomalocaris Cambrian Invertebrate
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Anomalocaris
Cambrian
Invertebrate
Predator
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15. f12_07_pg332 STRANGE PREDATORS Anomalocaris Cambrian Invertebrate
Largest Predator
2 Feet in Length
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f12_07_pg332

16. FISH

17. Fish – 5 Groups Agnathans – Early Cambrian Placoderms – Silurian
Subgroup: Ostracoderms
Jawless
Placoderms – Silurian
Plate Skinned Armored Jawed
Acanthodians – Silurian
Non-armored Jawed
Osteichthyes – Devonian
Bony
Chondrichthyes – Devonian
Cartilaginous

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Fish Evolution
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Coelacanth
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20. Bony Fish
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21. Sharks
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22. Placoderms
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23. CONODONTS – “Index Fossils”
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24. Amphibians – “Tetrapods”

25. Amphibians Descended from fish – “Ichthyostegids”
Labyrinthodonts – Descended Amphibians

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27. Amphibians – “Tetrapods”

28. Reptiles

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Pelycosaurs
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30. Mammal-Like Reptiles “Cynognathus”
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Mammal-Like Reptiles “Cynognathus”
Theorized to be a Descendant of the Pelycosaurs.
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31. PLANTS

32. Marine Plants
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33. Marine Plants
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CRINOID

34. Marine Plants
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CRINOID

35. Land Plant Evolution

36. Land Plants

37. Land Plants – 3 Advances Spore-bearing plants Gymnosperms Angiosperms
Naked-seed
Non-flowering
Seed-producing
Pollinating
Angiosperms
Flowering
Trachophytes (Vascular)
Seed-Producing Pollinating

38. Land Plants - 2 Groups Bryophytes (Nonvascular)
Seedless, Spore-Bearing plants
Common in Coal-Forming Plants of Carboniferous.
Trachophytes (Vascular)
Gymnosperms
Seed-Producing Pollinating

39. Land Plants Spore-Bearing Vascular
A – Lycopod
B – Calamophyton
C – Early Fern Tree

40. TRACHOPHYTES “Gymnosperms”

41. f12_82_pg365 SPORE-BEARING Nonvascular Plant f12_82_pg365.jpg

42. Vascular Plant
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43. Vascular Plant
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45. Proterozoic Extinctions

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47. Late Ordovician Extinction
Related to Global Cooling
2 Sequences (Regressive & Transgressive)

48. Late Devonian Extinction
Devonian Precursor to Intercontinental Seas which led to major swamps that followed during the Mississippian and Pennsylvanian Periods
Eutrophication “Anoxic Conditions”
Continental Glaciation

49. Late Permian Extinction
Era of Dinosaurs followed moving from an aquatic to terrestrial environment.
Greatest Mass Extinction
End of Trilobites
Global Cooling
Pangea Completed
Epicontinental Seas Drained
Equatorial Circulation Blocked
Volcanic Activity
Extraterrestrial Cause
Asteroid

50. THE END