Article
Molecular evidence for the early history of living amphibians.
Molecular phylogenetics and evolution - 1 Jun 1998
Feller A E, Hedges S B
Abstract excerpt
The evolutionary relationships of the three orders of living amphibians (lissamphibians) has been difficult to resolve, partly because of their specialized morphologies. Traditionally, frogs and salamanders are considered to be closest relatives, and all three orders are thought to have arisen in the Paleozoic (>250 myr). Here, we present evidence from the DNA sequences of four mitochondrial genes (2.7 kilobases)...
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