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A new species of polyconites from the lower Aptian of iberia and the early evolution of Polyconitid rudists

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The main diagnostic character of polyconitid rudists is a distinctive ectomyophoral cavity inserted behind a reflexed posterior myophoral plate in the left valve. The only pre-Aptian Old World polyconitid taxon recognized in the current literature is Horiopleura dumortieri (Matheron): this species clearly shows the prominent posterior myophoral shelf in the right valve that is diagnostic of the genus, which continues into the Albian. | A new species of polyconites from the lower Aptian of iberia and the early evolution of Polyconitid rudists

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