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Fig. 4 | BMC Evolutionary Biology

Fig. 4

From: Phylogeographic history of flat periwinkles, Littorina fabalis and L. obtusata

Fig. 4

Median-Joining (MJ) haplotype networks for the mtDNA genes concatenated (COI and Cyt-b). Circle areas are proportional to haplotype frequency. Numbers on branches indicate substitution steps between haplotypes (when more than one). Pie chart fillings correspond to species: solid colored circles – L. fabalis; low-transparency colored circles – L. obtusata. Individuals from Cabo do Mundo (admixed) are represented in white. The remaining colors refer to lineages, roughly in agreement with geography (North America – grey; Iceland, Norway, Sweden, Shetlands – blue; UK, Ireland, France – green; Iberian Peninsula – orange). Numbers within black squares indicate lineages. Letters within haplotypes refer to L. fabalis ecotypes/habitats

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