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EARLY PALEOZOIC LIFE

EARLY PALEOZOIC LIFE. Metazoan Invertebrates. Tabulata (Tabulate Corals) Ranged from Ordovician to Permian Major reef formers, Silurian and Devonian reefs Always colonial Tabulae, no septa. EARLY PALEOZOIC LIFE. Metazoan Invertebrates. Tabulata (Tabulate Corals).

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EARLY PALEOZOIC LIFE

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  1. EARLY PALEOZOIC LIFE Metazoan Invertebrates Tabulata (Tabulate Corals) Ranged from Ordovician to Permian Major reef formers, Silurian and Devonian reefs Always colonial Tabulae, no septa

  2. EARLY PALEOZOIC LIFE Metazoan Invertebrates Tabulata (Tabulate Corals)

  3. EARLY PALEOZOIC LIFE Metazoan Invertebrates Tabulata (Tabulate Corals) Favosites

  4. EARLY PALEOZOIC LIFE Metazoan Invertebrates Tabulata (Tabulate Corals) Halysites

  5. EARLY PALEOZOIC LIFE Metazoan Invertebrates Bryozoa (Moss animals) Ranged from Ordovician to Recent Major reef formers, Silurian and Devonian reefs Colonial

  6. EARLY PALEOZOIC LIFE Metazoan Invertebrates Bryozoa (Moss animals)

  7. EARLY PALEOZOIC LIFE Metazoan Invertebrates Bryozoa (Moss animals)

  8. EARLY PALEOZOIC LIFE Metazoan Invertebrates Bryozoa (Moss animals) Bryozoa

  9. EARLY PALEOZOIC LIFE Metazoan Invertebrates Bryozoa (Moss animals)

  10. EARLY PALEOZOIC LIFE Metazoan Invertebrates Brachiopoda (Lamp shells) Adundant, diverse and useful Cambrian to Recent most abundant in the Paleozoic Inarticulates most abundant in Cambrian to Silurian Articulates most abundant in Ordovician to Permian

  11. EARLY PALEOZOIC LIFE Metazoan Invertebrates Brachiopods (Lamp shells) Brachial Valve Lophophore Pedical Valve

  12. EARLY PALEOZOIC LIFE Metazoan Invertebrates Brachiopods Symmetry Pedical Valve Brachial Valve

  13. EARLY PALEOZOIC LIFE Metazoan Invertebrates Articulate Brachiopods

  14. EARLY PALEOZOIC LIFE Metazoan Invertebrates Articulate Brachiopods Hinge at posterior of valves Teeth and sockets May have a pedicle Shells are usually CaCO3 or can be phosphatic

  15. EARLY PALEOZOIC LIFE Metazoan Invertebrates Articulate Brachiopods Strophomenids, orthids, pentamerids and rhynconellids most common in early Paleozoic

  16. EARLY PALEOZOIC LIFE Metazoan Invertebrates Inarticulate Brachiopods

  17. EARLY PALEOZOIC LIFE Metazoan Invertebrates Inarticulate Brachiopods

  18. EARLY PALEOZOIC LIFE Metazoan Invertebrates Inarticulate Brachiopods Muscles hold valves together Long pedicle Shells are usually phosphatic

  19. EARLY PALEOZOIC LIFE Metazoan Invertebrates Mollusca Basic mollusc body plan changed over time to produce today's main classes of molluscs. Mantle tissue produces shell which protects visceral organs. Posterior mantle cavity houses gills which obtain oxygen from water passing into cavity. Head contains tentacles, eyes, brain, and radula (rasping "tongue") Viscera houses internal organs: heart, guts, kidney, gonads Foot is muscular, for movement

  20. EARLY PALEOZOIC LIFE Metazoan Invertebrates Mollusca

  21. EARLY PALEOZOIC LIFE Metazoan Invertebrates Mollusca • Bivalves • Shell elaborates into 2 "valves" • with connecting ligament • Head and radula disappear: • Sensory role of head taken over • by mantle (eyes, tentacles • develop there) • Feeding role of radula taken over • by enlarged gills, leading to • "filter feeding" • Early Cambrian to Holocene

  22. EARLY PALEOZOIC LIFE Metazoan Invertebrates Mollusca • Cephalopods • Shell reduced or lost • Rapid movement permits predation: • complex eye • complex brain, nervous system • advanced circulation (3 hearts) • Late Cambrian to Recent

  23. EARLY PALEOZOIC LIFE Metazoan Invertebrates Mollusca Cephalopods

  24. EARLY PALEOZOIC LIFE Metazoan Invertebrates Mollusca Cephalopods Chambered Nautilus

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