Extended Data Fig. 5: Branch length color representation of mean age differences between selected pairs of compared chronograms.

For every chronogram comparison, for example ‘Default’ ages - ‘Only root calibration’ ages in panel a, we subtracted the mean ages found in the second chronogram to the mean ages found in the first chronogram. See panels b, c and d for further comparisons. The chronogram represented (topology and relative branch lengths) in each case is the first among the two chronograms compared (for example, ‘Only root calibration’ in the case of panel a). Branches are colored with a gradient corresponding to the difference in mean age retrieved in each comparison for the node subtending the branch. ‘Default’ condition corresponds to a relaxed molecular clock analysis done with the 21 minimum age calibrations (minima) and the 6 maximum age calibrations (maxima), and ‘Only root calibration’ corresponds to a relaxed molecular clock analysis done with just the maximum age calibration for the root.