<i>Chthamalus montagui</i>.

<p>Sum of squared deviations (SSD) between the expected and observed mismatch distributions of pairwise differences, Harpending’s [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0178287#pone.0178287.ref038" target="_blank">38</a>] raggedness index (<i>r</i>) of the observed mismatch distribution and Fu’s [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0178287#pone.0178287.ref039" target="_blank">39</a>] <i>F</i>_S neutrality test on <i>COI</i> sequences pooled according to the three biogeographical areas; <i>P</i> values were obtained by coalescent simulations with 10000 replicates.