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Conodonts have been described from Jurassic rocks in Japan and from Upper Cretaceous rocks in western Africa. However, both occurrences might also be interpreted as reworked faunas. Arguments in favor of the reported ages include independent interpretation of the age of the enclosing rock and apparent lack of source rocks for reworking. Opposing arguments include well-established Triassic occurrences of conodonts that appear to be identical with most of the species reported as post-Triassic.

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