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Labyrinthodont is a term which was used for fossil amphibia. Although it is no longer a formal term in taxonomy, it is still useful as an evolutionary grade, a kind of catch-all term. Labyrinth mean a maze and dont means tooth.
Labyrinthodonts are often called Temnospondyls.The Labyrinthodontia is not a clade, because it is not monophyletic. It has been replaced in the classification by more correct terms.
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