Fig. 5.
(1 column) Diversification analyses of major Linnaean clades in the timetree of life. (a–b) Results of coalescent analyses testing models of diversification. Of 48 tetrapod clades, 37 showed significant model selected and they were used in these analyses. (a) Effect of clade size (number of described species). (b) Effect of clade age. (c) Diagram illustrating difference between stem and crown age for two clades. (d–e) Relationship of stem branch and crown age in mammals (d; r2 = 0.07) and birds (e; r2 = 0.04).