Figure 4

Calibrated Bayesian COI tree using BEAST, with the four groups observed for Xerocrassa montserratensis, colour coded as in the haplotype network and phylogenetic tree (Figs. 2 and 3), and species of the Iberian Peninsula and the Balearic Islands (Accession numbers in Table S4). The divergence among species of the Balearic Islands was used to calibrate the tree. The dots in the nodes provide posterior probabilities with size and grading according to the scale bar. The big black dots represent a posterior probability > 0.99. The tree was edited using Figtree v. 1.4.4. (http://tree.bio.ed.ac.uk/software/figtree/).