Science

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Science

  1. 1. Phylum= Arthropoda Subphylum= Chelicerata By Trevor Mahn and Daniel Thibault 5-27-09 Period 2 http://nma1.us/breaktime/2004-04/images/alan-camel_spider.jpg Camel Spider: Syndaesia solifugid
  2. 2. Classification <ul><li>Characterized by the absence </li></ul><ul><li>of antennae, jaws, and the </li></ul><ul><li>presence of feeding structures </li></ul><ul><li>such as pincer-like appendages </li></ul>
  3. 3. Physical Traits <ul><li>Always have eight legs </li></ul><ul><li>Segmented bodies with jointed limbs </li></ul><ul><li>Either have pincers or fangs </li></ul><ul><li>Tube like hearts and body cavity </li></ul><ul><li>Marine ones have gills </li></ul><ul><li>Some have very hard shell that can barely be broken </li></ul><ul><li>No wings </li></ul>
  4. 4. Reproduction <ul><li>Aquatic chelicerates use external fertilization </li></ul><ul><li>Internal fertilization or in other words sexual reproduction for land chelicerates </li></ul>
  5. 5. Feeding and Digestive System <ul><li>Guts are too narrow to take or digest solid food </li></ul><ul><li>Some are parasites, some predatory, some vegetarians, some scavenger </li></ul><ul><li>Some vegetarians use nectar or pollen to get food </li></ul>http://www.absoluteastronomy.com/topics/Chelicerata
  6. 6. Circulatory System <ul><li>They have open circulatory systems which most arthropods do </li></ul><ul><li>Have arteries but don’t use veins like people do </li></ul>
  7. 7. Respiratory System <ul><li>Depends on what sub-group they are in </li></ul><ul><li>Some have book lungs </li></ul><ul><li>Some have book gills </li></ul>
  8. 8. Living Environment <ul><li>Dependant on what kind of chelicerate it is </li></ul><ul><li>Some live in the ocean </li></ul><ul><li>Some live in desserts </li></ul><ul><li>Some can live in your house http://www.biologycorner.com/resources/spider_labeled.gif </li></ul>
  9. 9. People Interactions <ul><li>Some are eaten by people </li></ul><ul><li>Some such as spiders can be harmful through bites </li></ul><ul><li>Some like scorpions have harmful stings </li></ul><ul><li>Some parasites like ticks can be harmful too </li></ul>
  10. 10. Unique Features <ul><li>Very small but many are still predators </li></ul><ul><li>Originated as marine animals but slowly evolved into land dwelling animals </li></ul><ul><li>Scientists think there is about double the amount of chelicerates they have found that have not been found </li></ul>
  11. 11. Types of Chelicerates <ul><li>Sea-spiders </li></ul><ul><li>Horseshoe crabs </li></ul><ul><li>Spiders </li></ul><ul><li>Mites and ticks </li></ul><ul><li>Harvestmen </li></ul><ul><li>False scorpions </li></ul><ul><li>Sunspiders </li></ul><ul><li>Small whipscorpions </li></ul><ul><li>Whipspiders </li></ul><ul><li>Thelyphonida whipscorpions </li></ul><ul><li>Micro whipscorpions </li></ul><ul><li>Ricinulei </li></ul><ul><li>Scorpions </li></ul>
  12. 12. Interesting Facts <ul><li>77, 000 different species </li></ul><ul><li>People can actually eat fried tarantula </li></ul><ul><li>Scorpions cause about 7, 000 deaths per year mostly in other countries </li></ul>
  13. 13. Bibliography <ul><li>Various authors. Encyclopedia.com 5/20/09 http://www.encyclopedia.com/topic/Chelicerata.aspx </li></ul><ul><li>Various authors. Absolute Astronomy. 5/20/09 http://www.absoluteastronomy.com/topics/Chelicerata </li></ul>

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