Bayes Factors used to test the speciation rate models taking into account uncertainty of phylogenetic trees.

Values≥3 give support for the first model listed in the column, values≤−3 give support for the row model. Full = constant speciation rate; Linear, Sigmoidal, Hump = speciation varies as a function of body size, evolving by a diffusion process, with a linear, sigmoidal or hump function, respectively; Drift Linear, Drift Sigmoidal, Drift Hump = speciation varies as a function of body size, evolving by a diffusion process with a directional trend (Drift).