Figure 2.
Mean evolutionary RTT compared with phylogenetically corrected mean rates. Simple mean values of evolutionary rates at each time slice across the three datasets (a, mammalian body mass; b, avian beak shape; c, amniote bite force) show distinctive patterns of RTT. However, these patterns are far less prominent in phylogenetically corrected mean rates (α) through time. Values of α are the phylogenetic root estimates of the GLSλ=1 model. Faint lines represent each Markov chain Monte Carlo run while the bold line shows the median value for each time slice.