Cash, W. Ben Department of Biology, Maryville College, Maryville, Tennessee.
Zweifel, Richard G. Department of Herpetology, American Museum of Natural History, New York, New York.
Smithson, T. R. Science Maths and Information Technology, Cambridge Regional College, Kings Hedges Campus, Cambridge, United Kingdom.
Last reviewed:August 2020
- General characteristics
- Relationship of fish and amphibians
- Relationship of reptiles and amphibians
- Fossil record
- Related Primary Literature
- Additional Reading
One of the major classes composing the superclass Tetrapoda of the subphylum Vertebrata, and including frogs, toads, salamanders, and caecilians. Amphibians, that is, members of the class Amphibia, are tetrapod vertebrates. Modern amphibians number more than 8000 species and are assigned to the subclass Lissamphibia. They are further subdivided into three main groups: Anura or Salientia (frogs and toads, which comprise almost 90% of all amphibians); Urodela or Caudata (salamanders, including newts; Fig. 1); and Apoda or Gymnophiona (caecilians). Fossil amphibian forms have been assigned to various extinct groupings (for example, Temnospondyli) that vary according to different classification schemes. See also: Anura; Apoda; Lissamphibia; Origins of modern amphibians; Temnospondyli; Tetrapoda; Urodela; Vertebrata
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 46 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information