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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 ).
Amphibians are ectothermic, tetrapod vertebrates of the class Amphibia. All living amphibians belong to the group Lissamphibia . They inhabit a wide variety of habitats , with most species living within terrestrial , fossorial , arboreal or freshwater aquatic ecosystems .
The Ramsey problem, or Ramsey pricing, or Ramsey–Boiteux pricing, is a second-best policy problem concerning what prices a public monopoly should charge for the various products it sells in order to maximize social welfare (the sum of producer and consumer surplus) while earning enough revenue to cover its fixed costs.
Pages are automatically added to the category when their talk page is tagged with {{WikiProject Amphibians and Reptiles}}, and are continually being reassessed. Therefore this category may occasionally be empty; if this is the case, please don't delete it.
List-Class amphibian and reptile articles (3 C, 574 P) N. NA-Class amphibian and reptile articles (1 C, 191 P) P. Portal-Class amphibian and reptile articles (1 C, 15 P)
An amphibian is a member of the class Amphibia of ectothermic, tetrapod vertebrates Amphibian may also refer to: Amphibian (comics), two superheroes from Marvel Comics "Amphibian" (song), by Björk; Amphibious vehicle, a vehicle that can operate on water or land Amphibious aircraft, an aircraft for land, air, and sea
List of amphibian genera lists the vertebrate class of amphibians by genus, spanning two superorders. Superorder Batrachia. Order Anura. Frogs Suborder ...
AmphibiaWeb's goal is to provide a single page for every species of amphibian in the world so research scientists, citizen scientists and conservationists can collaborate. [1] It added its 7000th animal in 2012, a glass frog from Peru. [2] [3] As of 2022, it hosted more than 8,400 species located worldwide. [4] [5]