Fig. 4From: Prevalence and relationship of endosymbiotic Wolbachia in the butterfly genus ErebiaUnrooted phylogenetic relationship based on RAxML trees from polymorphic SNPs of Erebia and their associated Wolbachia strains. Numbers indicate bootstrap branch support and colors the geographic origin of the sampled specimens (see also Additional file 2: Table S2). Thick lines indicate shared splits as inferred by the function comparePhylo of the ape package in RBack to article page