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In page Salamander:
"Disagreement exists among different authorities as to the definition of the terms Caudata and Urodela. Some maintain that the Urodela should be restricted to the crown group, with the Caudata being used for the total group.[1][citation needed] Others restrict the name Caudata to the crown group and use Urodela for the total group.[3][4] The former approach seems to be most widely adopted and is used in this article.[5]
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