Ultrametric (strict clock) maximum clade credibility (MCC) tree used in GMYC analysis of COI. Terminal names and abbreviations as in Fig. 5. Samples from BOLD are marked with BOLD Sequence ID. Values above branches show Bayesian posterior probability support; values below branches show GMYC-support, i.e. support for the node as a GMYC-species among the alternative models of delimitation considered (95% confidence set). GMYC-support < 0.1 not shown. Splits of thick branches represent speciation events, splits of thin branches indicate within-species coalescent events and splits of red branches depend on the models considered (Table 6). Scale bar represents an artificial time scale with the root at time 1.