Results of fitting MEDUSA model to 12 higher taxonomic groups with dense subclade sampling.

“Clades” gives the number of subclades within each taxon, and N is the total species richness based on our compilation (Table S2). AICc-1 is the Akaike Information Criterion value with finite sample size correction (AICc) for a model with a single set of diversification parameters (speciation, extinction) across the full tree. AICc-MEDUSA is the corresponding AICc value under the best-fit multi-rate model selected by the MEDUSA stepwise procedure. Shifts gives number of diversification rate shifts under the best-fit model, and np is the corresponding total number of parameters.