How many living amphibian orders are traditionally recognized? Three living orders are traditionally recognized.
All living amphibians belong to the group Lissamphibia, traditionally divided into Anura, Caudata, and Gymnophiona. Anura contains frogs and toads; Caudata, also called Urodela, contains salamanders and newts; and Gymnophiona, also called Apoda, contains the limbless amphibians known as caecilians.
These groups differ strikingly in body form and life history. Frogs and toads generally lose the tail during metamorphosis, salamanders retain tails and may remain aquatic or terrestrial, and caecilians have elongated bodies adapted to burrowing or living in waterlogged soil. Their shared amphibian traits include ectothermy and, in many species, permeable skin.
The answer is “three” because the question refers to living orders and the traditional classification. Taxonomy can change as researchers revise evolutionary relationships, and terms such as Salientia may describe broader groups that include extinct frog relatives. Those broader or fossil-inclusive categories do not alter the standard count of three extant amphibian orders.