Tetrapoda is the clasification containing four-legged animals. It is first split between amphibians, which require water to reproduce, and amniotes, which do not. Amphibia is the focus of this chapter and Amniota will be explored in the following chapters.

Amphibia is split between the order Gymnophiona, the caecilians, and Batrachia, the classification containing the orders Caudata and Anura. Caudata contains the salamanders and newts while Anura contains the frogs and toads.

• Amphibia
  • Gymnophiona (page III)
  • Batrachia
    • Caudata (page IV)
    • Anura (page V)
• Amniota
  • Sauropsida (Chapters 36 and 37)
  • Mammalia (Chapter 38)

Resources: Amphibians in Kansas Frog Anatomy and Physiology - From an introductory Biology course at Cornell University Center for North American Herpetology Kansas Herpetological Society Reptiles and Amphibians of Virginia South Carolina Reptiles and Amphibians Reptiles and Amphibians of Oregon Iowa Herpetology Herp Pictures Society for the Study of Amphibians and Reptiles Amphibians - San Diego Zoo "Animal Snapshots" of San Diego Zoo amphibians AmphibiaWeb - U.C. Berkeley Caecilians Newts and Salamanders The Whole Frog Project - Lawrence Berkeley National Laboratory Overview of Amphibian Development Amphibian Embryology Tutorial Herpetology Lab (ZOO 5424L) - Alessandro Catenazzi, Florida International U. San Diego Zoo - Blue Poison Dart Frog, Madagascan Tomato Frog, Waxy Tree Frog, Asian Horned Frog, Red-eyed Tree Frog, Colorado River Toad, Argentine Giant Toad, Malayan Hill Toad, Painted Frogs

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