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12 Cards in this Set
- Front
- Back
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Crinoidea
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Ophiuroidea
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Asteroidea
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Echinoidea
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Echinoderms
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spiny skinned deuterostomes w/calcareous endoskeleton, water vascular system and 2 degree radial symmetry
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Chordates
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Bilaterally symmetric deutorostomes that display (at some stage of life): notochords, dorsal, hollow never cords, pharyngeal gill slits and a post anal tail. They are divided into subphyla based upon the degree to which these traits persist throughout the life cycle
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Chordates->Subphylum Vertebrata
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retain the dorsal, hollow nerve cord and post anal tail throughout life, and show varying degrees of retention for the other two traits. Also posses a vertebral column that supports (and usually encloses) the nerve chord. All vertebrates additionally posses these additional subphylum specific characteristics: a true liver, kidneys with a nephron, a tripartite brain, paired eyes adn labyrinthe organs.
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Chondrichthyes
-lover jaw -paired fins -fully cartilaginous skeleton -placoid scales |
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Chondrichthyes
-lover jaw -paired fins -fully cartilaginous skeleton -placoid scales |
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Cephalochordata
-lancelets; display all four chordate traits throughout life |
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tunicates or sea squirts; posses the "big four" traits only as larvae
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Holothuroidea
-Cucumber shaped with no arms; spines absent; tube feet with tentacles and suckers |
