Ultrametric tree for the hirtus-group. Bayesian tree estimated from combined partial mitochondrial sequence data. Branches supported by posterior probability >0.90 are labeled with values or, for branches with posterior probability of 1.0, an asterisk. Blue bars indicate 95% confidence intervals of estimated ages for the nodes. Taxa are labeled with species name and specimen identifier (Table 1). Scale at bottom indicates divergence times in millions of years as estimated by BEAST (Drummond et al. 2012). Branch colors correspond to those in Figure 2A.