Eusthenopteron

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Eusthenopteron (class Osteichthyes, subclass Crossopterygii A genus of lobe-finned fish, known from the Devonian of Europe and N. America, that exhibited a number of advanced characters (e.g. lungs and strong muscular fins) suggesting that it was closely linked with the evolution of the Amphibia. It was related to the lungfish and coelacanths.