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Marine Vertebrate Zoology

Marine Vertebrate Zoology. Vertebrate Ancestry How did it all begin?. Invertebrate Origin. A great division in the invertebrate world occurred creating two distinct evolutionary lines:. First Branch Annelids Molluscs Arthropods. Early Invertebrate. Second Branch Bryozoans

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Marine Vertebrate Zoology

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  1. Marine Vertebrate Zoology Vertebrate Ancestry How did it all begin?

  2. Invertebrate Origin • A great division in the invertebrate world occurred creating two distinct evolutionary lines: • First Branch • Annelids • Molluscs • Arthropods Early Invertebrate • Second Branch • Bryozoans • Brachiopods • Echinoderms • Chordates (hydra? sea anenome?) Vertebrate Ancestry

  3. Invertebrate Origin Deutrostome Protostome Vertebrate Ancestry

  4. Vertebrate Ancestry

  5. Chordates • Characteristics of all chordates: • Notochord • Hollow nerve cord • Pharyngeal gill slits • Post anal tail Vertebrate Ancestry

  6. Subphylum Hemichordata Acorn worms Subphylum Urochordata Tunicates Subphylum Cephalochordata Amphioxus (Lancelets) Subphylum Vertebrata Fishes, amphibians, reptiles, birds, and mammals Phylum Chordata Vertebrate Ancestry

  7. Cenozoic 65 million years - to the present • Paleozoic 600 - 280 million years • Mesozoic 225 - 136 million years Geological Record • Our understanding of taxonomy and systematics and the appearance of life on earth is based upon fossil remains. • To grasp the magnitude of the geological record it is divided into Eras, which are divided into periods, and divided further into epochs Vertebrate Ancestry

  8. ** Vertebrate Family Tree

  9. Amphibians

  10. Reptiles & Birds

  11. Mammals

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