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Phylum Echinodermata

Phylum Echinodermata. Echinodermata. All echinoderms are marine organisms 7,000+ species Ex: starfish, sea urchins, sea cucumbers and sand dollars. Starfish. Sea urchins. Sea cucumbers. Sand dollars. Characteristics.

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Phylum Echinodermata

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  1. Phylum Echinodermata

  2. Echinodermata • All echinoderms are marine organisms • 7,000+ species • Ex: starfish, sea urchins, sea cucumbers and sand dollars.

  3. Starfish

  4. Sea urchins

  5. Sea cucumbers

  6. Sand dollars

  7. Characteristics • Most exhibit pentamerous radial symmetry (can be divided into 5 equal parts from a central axis) • During development, they go through bipinnaria larva stage (bilateral symmetry – suggests evolution from a bilateral symmetrical ancestor) • Have tube feet with suction disks used in locomotion and getting food.

  8. Characteristics cont… • Has an endoskeleton to protect it’s soft tissues and is where muscles attach • Spiny projections (Echinoderm means “spiny skin”) • Major unifying characteristic is their water vascular system. Interconnecting, fluid filled tubes that act like a hydraulic pressure system

  9. Recap of Animal Kingdom PhylaInvertebrates – no backbone!

  10. Phylum #1 • Porifera • Representative Species? • SPONGE

  11. Phylum #2 • Cnidaria Representative Species? Jellyfish, hydra

  12. Phylum #3 • Platyhelminthes Representative Species? Flatworms (turbellarians, flukes, tapeworms)

  13. Phylum #4 • Nematoda Representative Species? Roundworms (ex: hookworm)

  14. Phylum #5 • Annelida Representative Species? Earthworm

  15. Phylum #6 • Mollusca Representative Species? Snail, clam, squid

  16. Phylum #7 • Arthropoda Representative Species? Crayfish, spiders, centipedes

  17. Phylum #8 • Echinodermata Representative Species? Starfish, sea cucumbers, sea urchins

  18. Animal Kingdom: Phylum #9Vertebrates (with a backbone)Phylum Chordata

  19. Finally….. • United streaming Video Clip – Echinoderms (5 minutes) • Video Quiz

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