Animal Diversity - Western Oregon Universityguralnl/101Animal DiversityI.pdfAnimal Diversity •...

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Animal Diversity • Key features of animals • Adaptations to land • Anatomical features of the evolutionary tree • Major animal phyla Squid-- Invertebrate

Transcript of Animal Diversity - Western Oregon Universityguralnl/101Animal DiversityI.pdfAnimal Diversity •...

  • Animal Diversity

    • Key features of animals

    • Adaptations to land• Anatomical features

    of the evolutionary tree

    • Major animal phyla

    Squid-- Invertebrate

  • Kingdom Animalia

  • Key Features of Animal

    Hippotamus amphibius

    • Multicellular• Heterotrophic• Sexual reproduction• Lack a cell wall• Motile (during some

    part of their life cycle)• Respond to stimuli

    rapidly

  • Phylogeny

  • Animal Diversity

    • Arose in Pre-Cambrian era

    • ~1 billion years ago• Fossils, 610-540

    million years ago• Invertebrates• Major body plans

    formed at Cambrian period

  • Major Body plans

    • Tissues vs no tissues• Symmetry• Body cavity• Embryo development• Vertebrate

  • Symmetry

  • Body plans

  • Major Animal Phyla

  • Major Animal Phyla

    • Phylum Porifera• Sponges• Lack tissues and

    organs• Colony properties

  • Diversity of sponges

  • Cnidarians

    • Jellyfish• Sea anemones• Corals• Two forms: polyps

    and medusa• Radial symmetry• Two tissue layers• Nerve net

  • Cnidarian diversity

  • Platyhelminthes

    • Flatworms• Bilateral symmetry• Cephalization (head)• Organs and tissues

  • Tapeworm

  • Nematoda

    • Roundworms• False body cavity• Lack circulatory

    system

  • Annelida

    • Segmented worms• Hydrostatic skeleton• Closed circulatory

    system• True body cavity

  • Earthworms

  • Mollusca

    • Mantle: extension of the body wall

    • Hemocoel• Open circulatory

    system

  • Diversity of mollusks: gastropod, bivalve

  • Cephalopod Mollusks

  • Arthropods

    • Largest group• Exoskeleton• Chitin• Molting• Compound eye • Flying invertebrates

  • exoskeleton

  • Diversity

  • Echinoderms

    • Endoskeleton• Bilateral symmetry in larva


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