Classify living invertebrates into different phyla

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Presentation transcript:

Classify living invertebrates into different phyla 11/10/2018

Classification? Animals with backbones One phylum: chordates Vertebrates Animals Animals with backbones One phylum: chordates Animals without backbones 8 phyla Invertebrates 11/10/2018

Invertebrate Phyla Sponges Cnidarians Platyhelminthes Nematodes Family Order Class Phylum Kingdom Sponges Cnidarians Platyhelminthes Nematodes Mollusks Annelids Echinoderms Arthropods 11/10/2018

Sponges (Porifera) Most primitive Cells relatively independent Mostly marine No Symmetry 11/10/2018

Cnidarians Mostly marine Radial Symmetry 11/10/2018

Cnidarians Jellyfish Hydra Coral Sea anemone Portuguese Man-O-War 11/10/2018

Platyhelminthes Flatworms Bilateral symmetry Cephalization 11/10/2018

Planarian – freshwater flatworm 11/10/2018

Nematods Tube-like digestive tract Roundworms! Mouth and anus No segmentation 11/10/2018

Mollusks Clams, snails, squids Varied habitats Marine Freshwater Terretrial 11/10/2018

Annelids Segmented worms Common earthworm Leech 11/10/2018

Echinoderms Always marine Starfishes, sea urchins, sea lilies Spiny skin 11/10/2018

Brittle Star – An Echinoderm 11/10/2018

Arthropods Joint-legged animals External skeleton Huge variation – mostly insects 11/10/2018

Section Review (cont.) 14 invertebrates 15 ectoderm 16 sponges 17 endoderm 18 coelom 19 Cnidarian 20 segmented 21 echinoderms 22 Crustacea 23 sea squirts 24 25 11/10/2018

Classify living invertebrates into different phyla 11/10/2018

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