Figure 4

Distribution of haplotypes and haplotype groupings in the NE Atlantic of Litoditis marina (PmII). A. Relationships among mtDNA haplotypes based on statistical parsimony network. Haplotypes are divided into three groups, corresponding to their geographic distribution and relationships. Haplotypes of group 1 are coloured in black-grey-white, haplotypes of group 2 in red-pink-purple and haplotypes of group 3 in green. Haplotypes found in one location are coloured white, pink or dark green, haplotypes that are shared between locations have a shaded grey, pink or green colour. B. Distribution of haplotypes in the NE Atlantic. Group 1 haplotypes are continuously distributed from the Bay of Biscay over the English Channel and the British Isles into the North Sea and the Baltic Sea. Second haplotype group co-occurred with group 1, but was absent from the Baltic Sea and the most northern locations in the NE Atlantic. Most haplotypes of group 3 were restricted to the English Channel and the North Sea (Figure from [81]).