The Relationships of the Modern Amphibia: A Re-Examination

Abstract
Evidence is presented supporting the viewpoint that all the modern Amphibia are clearly related. It is suggested that the three living orders constitute a natural monophyletic group[long dash]the infra-class Lissamphibia sensu Gadow. Other theories are briefly reviewed. Finally an attempt is made to determine the Paleozoic ancestors of the recent amphibians, but the available evidence is contradictory and inconclusive.

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