Figure 1 : A) Distribution map of Haploniscus bicuspissampled around Iceland from BIOICE, IceAGE and literature data. Black symbols refer to the type locality by Sars (1877) and Wolff (1962). B)-D) Unrooted genetic networks. B) COI haplotype network calculated with SplitsTree, C) network based on nuclear ddRAD loci calculated with SplitsTree and D) COI haplotype network calculated with Network. In B) and C), colors indicate lineages delimited by COI (highlighting the conflicts in the nuclear dataset). In D), colors represent single stations (see Figure A). Individuals are not shown to improve the readability of the figure, please refer to Supplemental Figure S1 for that.