Results of a Bayesian estimation of divergence times (in millions of years) for nodes representing the most recent common ancestor (MRCA) of relevant clades.

ESS, effective sample size; HPD, the 95% highest posterior density interval (equivalent to a confidence interval); Likelihood, posterior log likelihood (of the model, given the observed data); TMRCA, time to MRCA (/Ma). Explanation of clades: ingroup, MRCA of all taxa excluding the outgroup (S. incognitum); japonicum, MRCA of S. japonicum and all ingroup taxa excluding S. sinensium; malayensis, MRCA of S. malayensis and all S. mekongi taxa; mekongi, MRCA of all S. mekongi taxa.