Abstract
THE planktonic foraminiferal fossil record reveals two major evolutionary radiations, one in the Palaeogene and another in the Neogene. Preceding each radiation, at the beginning and middle of the Cainozoic, there were severe reductions in faunal diversity. Both reductions involved an elimination of tropical and sub-tropical forms and the radiations involved their restoration1.
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CIFELLI, R. Evolution of ocean climate and the record of planktonic foraminifera. Nature 264, 431–432 (1976). https://doi.org/10.1038/264431a0
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DOI: https://doi.org/10.1038/264431a0
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