Jurassic planktonic foraminifera from Pieniny Klippen Belt and their taxonomic and phylogenetic importance (Carpathians, southern Poland)

Abstract

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 vigorous upwelling circulation making nutritiens available in the surface waters.