Radiolarian Cretaceous -Recent

Bathropyramis is a radiolarian with a lattice-like skeleton, approximately 300 |m in height. Three radial spines form a tripod and the mouth is open. These cone-shaped radiolarians with an open basal mouth have adapted to live in areas with rising water currents.


Foraminifera Palaeocene -Recent

This thin-walled, globular foraminifera is planktic. The test (approximately 300 |lm in diameter) has been modified to maintain buoyancy. The chambers are inflated and the surfaces of some living species are covered with fine spines that support a frothy ectoplasm. Planktic foraminifera are extremely important biostratigraphic markers in the Cenozoic.

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