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

Figure 3

Relationships between age and richness within 12 major taxonomic groups for which dense subclade sampling was available as part of the timetree project [24].

Lines represent fitted PGLS relationships between log(richness) and clade age. Beetles show a significant age-diversity relationship (β = 0.017, p = 0.004). However, all slopes are less than expected under both relaxed-rate and phylogenetic-rate models of among-clade heterogeneity in net diversification rates (Table 1).

Figure 3