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&_160;&_160; Order Temnospondyli - extinct
Subclass Lepospondyli - extinct
Subclass Lissamphibia
&_160;&_160; Order Anura
&_160;&_160; Order Caudata
&_160;&_160; Order Gymnophiona In recent decades, there has been a dramatic decline in amphibian populations around the globe and many species are now threatened or extinct. Scientists do not agree on the cause. Amphibians evolved in the Devonian Period. They were a top predator in the Carboniferous Period, before proto-crocodiles evolved and took over that niche. The first major groups of amphibians developed in the Devonian Period from fish similar to the modern coelacanth and lungfish where the fins had evolved into legs. These amphibians were around one to five meters long. The land was safe as the giant fish and sharks in the ocean could not come onto land. However, there were two problems with living out their entire lives on land. Primarily, the food that these amphibians consumed was in the water, but also at this point the skin on most of these amphibians was not water-tight.
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Amphibians Articles
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