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Organisms / Animalia / Craniata / Class:
Amphibia - Amphibians:
· General Information
· References
Orders |
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| Animals of the class Amphibia. They are poikilothermic ("Cold-blooded"
but actually with varying body temperature). They differ from fish in having four pentadactyle legs typical of tetrapods, hip girdle connected to the vertebral column at the sacrum, and an ear drum connected to the inner ear by a rod of bone (columella auris), which crosses the middle-ear. They differ from reptiles in that fertilization is not accomplished by coition (sexual intercourse), and the eggs are unprotected by a shell and embryonic membranes. |
| Primary References at the level of this taxa | |
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| B87 | Norman Frank and Erica Ramus |
| A Complete Guide to Scientific and Common Names of Reptiles and Amphibians of the World | |
| B79 | Lynn Margulis and Karlene V Schwartz |
| Five Kingdoms - An Illustrated Guide to the Phyla of Life on Earth, 3rd Edition | |
| B73 | Eleanor Lawrence |
| Henderson's Dictionary of Biological Terms, 11th Edition | |