Abstract
A taxon, traditionally referred to the rank order, encompassing all recent taxa of salamanders and their close fossil relatives, is highly supported as holophyletic in all recent phylogenetic analyses of amphibians. Under the Duplostensional Nomenclatural System, among about thirty nomina available for this taxon in the literature, two only qualify as sozodiaphonyms: Urodela Duméril, 1805 and Caudata Duméril, 1805. The conflict for validity between these two nomina is solved by the Principle of Airesy (first reviser). The valid nomen for this taxon is therefore Urodela Duméril, 1805, which corresponds to the majority of uses in the literature since their creation, and which should replace all other nomina, authorships and dates sometimes credited to this taxon in publications, catalogues and databases.
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