"Figure 1. Prior sensitivity for every combineExtinctionAtNodes option currently implemented in BAMM. We simulated 100 constant-rate birth-death trees similar to the cetacean phylogeny (Steeman  et al., 2009). We analyzed each tree under a range of prior values for the expected number of diversification-rate shifts, (columns; gamma = 10, 2, 1, 0.5, 0.1), and using each combineExtinctionAtNodes option available in BAMM (rows; combineExtinctionAtNodes = ""if_different"", ""favor_shift"", ""random"", ""left"", ""right""). Each plot summarizes the prior distribution (grey lines) and the corresponding posterior distribution (blue lines) for the number of diversification processes. With the exception of the ""if_different"" option, the estimated posterior distribution closely follows the assumed prior distribution over the entire range of parameter space explored. Notably, combineExtinctionAtNodes = ""random"", ""left"" and ""right"" generate effectively identical posterior distributions."