Supplementary Information from Probabilistic divergence time estimation without branch lengths: dating the origins of dinosaurs, avian flight and crown birds

Additional information describing: 1) Tree construction (a full description of the metatree protocol), 2) Description of the Hedman algorithm (one of the two dating methods applied here), 3) Probabilistic divergence dates (summary values for dates plotted in Figure 1), 4) Clock-based dates for comparison (Sources for dates in lower right of Figure 1), 5) Dryad files (list of additional Dryad files), 6) Supplementary References, and 7) Supplementary Figure Captions