Sampling locations and regions for beetle data. A map of La Palma with sampling locations indicated by black dots . Sampling locations where haplotypes from a particular phylogroup (cf. Figure 4) were found are depicted by the dashed curves. Note that the sampling location Altos de Jedey is the only one where haplotypes from two distinct phylogroups (namely 1 and 2) were found. The six groups of sampling locations corresponding to the six regions R1, R2, ..., R6 discussed in the text are also indicated.