Cretaceous Planktic Foraminifera (IMAGE) University of Bristol Caption Figure showing the very diverse late Cretaceous planktic foraminifera, the very small and simple group that survives the extinction, and then the increasing diversity of shapes in this group of plankton as they recover during the early Paleogene. Credit Christopher Lowery Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.