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The list below largely follows Darrel Frost's Amphibian Species of the World (ASW), Version 5.5 (31 January 2011). Another classification, which largely follows Frost, but deviates from it in part is the one of AmphibiaWeb , which is run by the California Academy of Sciences and several of universities.
This is a list of amphibians of Great Britain. There are seven amphibian species native to Great Britain , in addition, there are a number of naturalized species. The natives comprise three newts , two toads and two frogs .
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 have a juvenile stage and an adult stage, and the circulatory systems of the two are distinct. In the juvenile (or tadpole) stage, the circulation is similar to that of a fish; the two-chambered heart pumps the blood through the gills where it is oxygenated, and is spread around the body and back to the heart in a single loop.
This could not be linked directly to human activities, such as deforestation, and was outside the range of normal fluctuations in population size. [203] Elsewhere, habitat loss is a significant cause of frog population decline, as are pollutants, climate change, increased UVB radiation, and the introduction of non-native predators and ...
Printable version; In other projects Wikidata item; ... Lists of amphibians by region are lists of amphibians in a given continent, country or smaller region.
Ascaphidae and Leiopelmatidae are primitive to almost all other frogs in having nine amphicoelous vertebrae and a caudalipuboischiotibialis tail-wagging muscle in adults. [9] a type of vertebrae seen mostly in fish and early terrestrial tetrapod fossils (such as fossil salamanders and fossil frogs. The joints in amphicoelous vertebrae allow for ...
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]