phylum echinodermata 2012 2013

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  • 1. Phylum EchinodermataKingdom Animalia

2. Name and Body Symmetry echino = bumpy orspiny derm = skin Echinoderms are radiallysymmetrical=equal unitsarranged in a circle arounda central disk Many have five equal unitsso we can specify that theyhave pentamerous radialsymmetry as adults 3. Distribution & Habitat, Reproduction-Found worldwide-Epibenthic, Epifauna-External fertilization-External development-Planktonic larvae(unlike adult they arebilaterally symmetrical) 4. Anatomy - Endoskeleton 5. Locomotion-Slow moving creatures-Most use tube feet-watch 6. 1) Class Ophiuroidea The Brittle Stars 7. 2) Class Echinoidea Sea Urchins &Sand DollarsAristotles Lantern 8. Sea Urchins 9. Sand DollarsWatch a sanddollar move 10. 3) Class Holothuroidea Sea CucumbersWatch a sea cucumber 11. 4) Class Crinoidea Feather Stars & SeaLilies 12. 5) Class Asteroidea The Sea Stars 13. Sea Stars