Phanerozoic evolution of megascopic, horotelic, adaptationally specialized eukaryotes."

Eukaryotic microfossils appeared in the late Paleoproterozoic, some 1700 million years ago. Their evolution was at first slow, but diversity and turnover rates greatly increased around 1000 million years ago. Evolutionary rates accelerated again during the Cambrian, as Andrew H. Knoll shows in Chapter 4: protistan diversity increases by a factor of two and turnover rates by a factor of ten.

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