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Asteroidea

Asteroidea. By: Jessica Fahey, Rebekah Leslie, Christina Kelly . INTRODUCTION. +2000 Species Also known as Sea Stars or Star fish Echinoderms Marine Animals No fresh Water Sea Stars Carnivore Few Fossils . EVOLUTION OF THE TAXON. Ordovician period Somasteroidea Extinction Events

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Asteroidea

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  1. Asteroidea By: Jessica Fahey, Rebekah Leslie, Christina Kelly

  2. INTRODUCTION +2000 Species Also known as Sea Stars or Star fish Echinoderms Marine Animals No fresh Water Sea Stars Carnivore Few Fossils

  3. EVOLUTION OF THE TAXON Ordovician period Somasteroidea Extinction Events Diversified rapidly Speciation Currently 7 living groups of sea stars

  4. PHYSICAL CHARACTERISTICS Spiny Skin Tube feet Arms Central Disk

  5. BEHAVORIAL CHARACTERISTICS Slow Moving Feet provide suction Rock pools and beaches Brackish water Camouflage Adaptation

  6. LIFE CYCLE Egg and Sperm External Fertilization – free spawning Rapid metamorphose into adults Ability to Regenerate 5-34 year life span

  7. FUN FACTS 1cm to 3 feet weigh up to 11 lbs. Complete regeneration 4-30 Arms Brainless Bloodless Not blind

  8. SOURCES Mah, Christopher (2012). "Notomyotida". World Register of Marine Species. "Echinodermata: Spiny-skinned animals: sea urchins, starfish, and their allies". Tree of Life web project. Mah, Christopher (2012). "Notomyotida". World Register of Marine Species. Hansson, Hans (2013). "Asteroidea". World Register of Marine Species. Retrieved 2013-07-1

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