marine ecology, april 30, 2008
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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. - PowerPoint PPT PresentationTRANSCRIPT
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Marine Ecology, April 30, 2008Invertebrates 4: Phylum Echinodermata & Phylum Chordata!
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Phylum EchinodermataBasic features Calcareous internal
skeleton Water vascular
system (controls tube feet)
Pentamerous symmetry (adults)/bilateral symmetry (larvae)
Mutable connective tissue
General body organization
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Class Asteroidea (sea stars)
Appearance Location Other aspects of natural history
Pycnopodia helianthoidesPisaster ochraceus
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Class Echinoidea (urchins and relatives) Appearance Location Other aspects of natural history
Strongylocentrotus purpuratus
Strongylocentrotus franciscanus
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Class Holothuroidea(sea cucumbers) Cucumaria miniata
Photo: Neil McDaniel, Waterhouse Marine Images
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Class Ophioroidea(Brittle stars, basket stars)
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Class Crinoidea(Sea lilies, a.k.a feather stars)
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Phylum ChordataSubphylum Urochordata
Our closest invertebrate relatives are slimy sacs that pump seawater
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Class Ascidacea (tunicates)
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Family Cottidae: sculpins
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Family Gobiesocidae: clingfish
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Family Pholidae: gunnels
Photo: Pelagia Scuba
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Family Hexagrammidae (lingcods and greenlings)