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The absolutely incredible discovery of several fully articulated shark fossils from the Late Cretaceous, 105 to 72 million years ago, is shedding some much-needed light on the mysterious shark family tree.
"Our results support the view that lamniforms were ecomorphologically highly diverse and represented the dominant group of sharks in Cretaceous marine ecosystems,"may have fed predominantly on nektonic hard-shelled prey items such as ammonites and sea turtles rather than on benthic invertebrates, and its extinction during the Campanian, well before the end-Cretaceous crisis, might have been related to competition with emerging blunt-toothed globidensine and prognathodontinefossils...
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