Map of the geographical distribution of populations and median-joining haplotype network of the COI gene in M. quadrifasciata. Each circle in the map represents one population as delimited by this study; the size of the circle represents the frequency of individuals and the black hexagons represent the sampled sites. Each circle in the haplotype network corresponds to one haplotype and its size is proportional to the haplotype frequency; each mark in the line connecting the haplotypes refers to a mutational step. The haplotype code is according to tab. S1 available in online material.