The Palaeozoic fauna 1. Sepkoski’s Curves 2. The Palaeozoic fauna 3. Brachiopods 4. Corals 5. Graptolites 6. Predators 7. Ecological overview.

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Presentation transcript:

The Palaeozoic fauna 1. Sepkoski’s Curves 2. The Palaeozoic fauna 3. Brachiopods 4. Corals 5. Graptolites 6. Predators 7. Ecological overview

1. Sepkoski’s Curves Family diversity End Permian extinction Ordovician radiation Palaeozoic diversity plateau Palaeozoic fauna

2. Palaeozoic fauna Corals and other barrier builders Lie-in-wait predators Brachiopods and other filter feeders Graptolites and other plankton

3. Brachiopods

4. Corals Corals are cnidarians like jellyfish and sea anemones Basic coral morphology Coral diversity through time

5. Graptolites Pterobranch Planktonic graptoloid Benthic dendroid

6. Predators Trilobites Nautiloids Conodonts

7. Ecological overview 1. Palaeozoic fauna takes over slowly 2. Fauna reaches higher diversity than before 3. Includes mud grubbers like trilobites from Cambrian fauna 4. Includes filter feeders and macrozooplankton 5. Increased niche space above seafloor 6. Includes greater predator pressure 7. Survives mass extinctions at end Ordovician and end Devonian 8. Wiped out at end Permian