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Clade Age and Species Richness Are Decoupled Across the Eukaryotic Tree of Life

Figure 4

Distributions of rank-order correlations between clade age and species richness predicted under MEDUSA model of rate variation for 12 major taxonomic groups.

Vertical red lines show the observed correlation for each group. Observed correlations are significantly lower than the corresponding model-predicted value for 10 of the 12 groups. The high variance of the MEDUSA-predicted distributions for gymnosperms and actinopterygiians is largely explained by the small number of clades (N = 12) available for those groups (Figure S5).

Figure 4