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Science

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