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Marine Ecology, April 30, 2008

Marine Ecology, April 30, 2008. Invertebrates 4: Phylum Echinodermata & Phylum Chordata!. Phylum Echinodermata Basic features. Calcareous internal skeleton Water vascular system (controls tube feet) Pentamerous symmetry (adults)/bilateral symmetry (larvae) Mutable connective tissue.

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Marine Ecology, April 30, 2008

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  1. Marine Ecology, April 30, 2008 Invertebrates 4: Phylum Echinodermata & Phylum Chordata!

  2. Phylum EchinodermataBasic features • Calcareous internal skeleton • Water vascular system (controls tube feet) • Pentamerous symmetry (adults)/bilateral symmetry (larvae) • Mutable connective tissue General body organization

  3. Class Asteroidea (sea stars) • Appearance • Location • Other aspects of natural history Pisaster ochraceus Pycnopodia helianthoides

  4. Class Echinoidea(urchins and relatives) • Appearance • Location • Other aspects of natural history Strongylocentrotus purpuratus Strongylocentrotus franciscanus

  5. Class Holothuroidea(sea cucumbers) • Cucumaria miniata Photo: Neil McDaniel, Waterhouse Marine Images

  6. Class Ophioroidea(Brittle stars, basket stars)

  7. Class Crinoidea(Sea lilies, a.k.a feather stars)

  8. Phylum ChordataSubphylum Urochordata • Our closest invertebrate relatives are slimy sacs that pump seawater

  9. Class Ascidacea (tunicates)

  10. Family Cottidae: sculpins

  11. Family Gobiesocidae: clingfish

  12. Family Pholidae: gunnels Photo: Pelagia Scuba

  13. Family Hexagrammidae (lingcods and greenlings)

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