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Researchers at the Universidade Estadual de Ponta Grossa in southern Brazil have identified a previously unknown species of ancient marine bivalve from a fossil roughly 400 million years old, adding a new chapter to the story of life in the prehistoric seas that once covered much of South America. The newly named species, Actinopteria grahni, was recovered from rock layers belonging to the Devonian Period, long before dinosaurs walked the Earth. |