Fig. 1

Genealogical relationships of Pelvetiopsis spp. based on mtIGS data. a MtIGS haplotype network; the dots represent inferred, unsampled haplotypes and the small rectangles represent inferred indels. b Reconstructed 50% majority-rule consensus phylogenetic tree. Numbers above and below the branches are Bayesian posterior probabilities (>0.90) and maximum likelihood bootstrap support values (>70), respectively. For clarity, outgroup (Fucus) branches were collapsed (tip triangles), with the horizontal length of the triangle representing the distance from the branches’ common node to the tip of the longest branch