<p>Consensus tree of 170,000 trees (after burn-in) generated by MCMC analysis of 20 million generations. 544 bp long COI fragments of 189 <i>Echinometra</i> specimens were used in the analysis. 181 sequences were generated in the current study corresponding to five <i>Echinometra</i> species, and a novel <i>Echinometra</i> mitochondrial lineage. Sequences downloaded from GenBank represent the eight known species of <i>Echinometra</i> and are denoted <i>E</i>. sp. A, <i>E. mathaei</i>, <i>E</i>. sp. C and <i>E. oblonga</i>, <i>E. insularis</i>, <i>E. lucunter</i>, <i>E. viridis</i> and <i>E. vanbrunti</i> (accession numbers: AY262861, AY262940, AY262932, AY262886, AY262906; AF255471, AF255530 and AF255526, from Landry et al. [4] and McCartney et al. [7], respectively). <i>Heliocidaris crassispina</i> (Echinodermata, Echinoidea) (GenBank accession number: JN716400) was used as outgroup. The supporting > 50% values of 1,000 bootstrap replications of the ML analysis and the posterior probabilities of the BI analysis are shown above nodes respectively. Clades A-H are discussed in the text. </p
