Fig. 3

Density tree contrasting divergence times under distinct clock models. Each tree represents the maximum compatibility tree and median divergence times obtained from each model. Gray bars at nodes indicate range between maximum and minimum divergence times for each model and node values represent the midpoint between these respective maximum and minimum divergence times. IGR independent gamma rates uncorrelated clock, ILN independent lognormal relaxed clock, TK02 continuous autocorrelated clock, WN white noise uncorrelated clock