MtDNA haplotype networks of populations generated with TCS. (a) Mimus, (b) Analges, (c) Myrsidea and (d) Brueelia. Haplotypes are scaled proportionately to the number of samples. Colours of the haplotypes refer to the geographic origin of the specimens (Figure 2). Empty circles mark missing haplotypes along mutational pathways. Dotted lines represent relationships beyond the parsimonious criterion of 14 mutations calculated in TCS. Most island populations in Analges are too divergent to be unequivocally linked. Fine dashed red lines in the Analges and Brueelia networks denote the transition in allelic variability identified from the EF1α sequences.