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Amphibians are ectothermic, anamniotic, four-limbed vertebrate animals that constitute the class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all tetrapods excluding the amniotes (tetrapods with an amniotic membrane, such as modern reptiles, birds and mammals).
amphibian, (class Amphibia), any member of the group of vertebrate animals characterized by their ability to exploit both aquatic and terrestrial habitats.
Amphibians are small vertebrates that need water, or a moist environment, to survive. The species in this group include frogs, toads, salamanders, and newts. All can breathe and absorb water...
What Is an Amphibian? Amphibians are ectothermic (cold-blooded) vertebrates that belong to the Class Amphibia. A defining characteristics is their ability to live both in aquatic and terrestrial environments.
On this page you’ll find out what an amphibian is, how amphibians evolved, and the different types of amphibian alive today. On the way you’ll meet some amazing amphibians, both extinct and living.
Amphibians are a group of cold-blooded tetrapods (four-limbed vertebrates), except those with an amniotic membrane (the amniotes). They are a paraphyletic group belonging to the class Amphibia.
Amphibian - Evolution, Classification, Adaptation: Appearing during the Middle Mississippian Epoch, amphibians likely descended from aquatic tetrapods which had lungs and appendages with internal skeletal support.