Amphibia[1]
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Amphibia[1]

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Amphibia[1] Amphibia[1] Presentation Transcript

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  • Class Amphibia
  • Class Amphibia
    • Includes caecilians, salamanders, frogs, and toads, newts
    • More than 5,400 species
    • Live in moist habitats
    • Transition from WATER to LAND
    • Many species are greatly threatened
  • What about their habitat?
    • Found on every continent except Antarctica
    • Typically near water
    • Reproduction
      • Eggs without shell
  • A threatened group
    • Population crashes and mass extinctions
    • Causes?
  • Starting on the outside. . .
    • SKIN
    • Ectotherms
    • Protection and respiration
    • Mucous - lubricates and protects from predators
    • Indicator of ecosystem health
  • Frog Legs Anyone?
    • Powerful hind legs
    • Strong bones and muscles
    • Able to leap many times their body length
    • 4 legs - tetrapods
  • Frog Senses
    • SIGHT
      • Eyes work equally well in and out of water
      • Nictitating Membrane
    • SOUND
      • Tympanic Membrane
  • Order Anura “without a tail”
    • Frogs and Toads
      • Live in a variety of habitats
      • Most frogs spend part of lives in water
      • Larvae - tadpoles
      • Toads typically have rough bumpy skin
  • Order Urodela “visible tail”
    • Salamanders
      • Elongated bodies, long tails, 2 prs of legs
      • Most are found in N and S America
      • Smooth moist skin
      • Lungless salamanders - largest group
        • Gills, lungs, both, or none
  • Order Apoda “no legs”
    • Caecilian
      • Legless amphibians
      • Most are found in tropical areas
      • Rarely seen - little known about behavior
      • Nearly blind
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