black frog in front view

>For other uses, see Amphibian (disambiguation). Subclass Labyrinthodontia - extinct Subclass Lepospondyli - extinct Subclass Lissamphibia Anura Caudata Gymnophiona Amphibians (class Amphibia) are a taxon of animals that include all tetrapods (four-legged vertebrates) that do not have amniotic eggs. Amphibians (from Greek αμφις "both" and βιος "life") generally spend part of their time on land, but they do not have the adaptations to an entirely terrestrial existence found in most other modern tetrapods (amniotes). There are about 5,700 living species of amphibians. The study of amphibians and reptiles is known as herpetology. The fear of amphibians and reptiles is known as herpetophobia. See more at Wikipedia.org...