Figure 14

Change in divergence date estimates for plethodontid salamanders following re-estimation of branch lengths using ML. (a) Divergence dates for plethodontid salamanders estimated by Mueller (2006) using penalized likelihood, with branch lengths estimated using a Bayesian framework. (b) Divergence dates estimated in this study using penalized likelihood, with branch lengths estimated using ML. Italicized dates were estimated as younger than in the original analysis. Non-italicized dates were estimated as the same age or older than in the original analysis.