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Re: Rate of evolution linked to metabolic rate

Does anyone ever have reported the *amphibian* (specially the anuran)
diversity evolution after K-T bondary?

Sort of.

David Marjanovic & Michel Laurin (2007): Fossils, molecules, divergence times, and the origin of lissamphibians, Systematic Biology 56(3): 369 -- 388

Though you have to extract the information from our figures, and there isn't much information in the first place, because the fossil record is not terribly dense. Many clades have no known fossil record at all, e. g. the poison-dart frogs or the megophryids http://en.wikipedia.org/wiki/Megophryidae.