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In this brief review of the occurrence of planktonic foraminifera in the Middle and Upper Jurassic in the Pieniny Klippen Belt (Carpathians, southern Poland), we wish to draw attention to the importance of these faunas in early evolution of the group. The appearance of planktonic foraminifera could be related to major palaeogeographic changes in the Tethys during early Middle Jurassic which induced...
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