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Early Middle MioceneFossil DiatomDiatom GenusMolluscan FaunaMiddle PliocenePigmented TeethSystematic Paleontologythe North PacificLate PermianNortheast ChinaScanning Electron MicroscopyPlanktonic Foraminiferalthe Western North PacificSkeletal StructuresMorphological DifferencesUpper PaleozoicSkeletal StructureMiddle PermianPhylogenetic RelationshipsTwo New