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Estimated fractions of speciation events that are potentially anagenetic for Cenozoic (solid lines) and Neogene (dashed lines) planktic Foraminifera, assuming varying levels of total error. Total errors are expressed as percentages of the dating errors (100% = ±0.1 Ma for the Neogene, ±0.4 Ma for Paleogene). Estimates take into account morphological and phylogenetic evidence (Table S1).
