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Inoceramids are an extinct group of pteriomorph bivalves. They form a massive shell of different shapes with the typical growth lines forming concentric elevations/ribs. The internal shell structure is characterized by calcitic prisms. Representatives of Inoceramids that lived in the Cretaceous period (ca 130‒66 Ma). The largest shells exceeded almost 1,5 meters. They were cosmopolitans. ## Keywords Mesozoic, Cretaceous, Bivalvia, Pteriomorphia
