Figure legends
Figure 1. ML phylogenetic tree of the strain groups based on concatenated sequences of seven Wolbachia genes (16S, MLST and wsp). Black circles are nodes with bootstrap value > 95%.
Figure 2. Phylogenetic tree of Wolbachia strain groups (top) and their scale insect hosts (left), with the black squares in the matrix indicating which host species are infected with which Wolbachiastrain group(s). Colors in the phylogenies represent supergroups inWolbachia and host families, respectively. Host species are represented by codes (for full species names please refer to File S2).
Figure 3. The effect of host phylogenetic distance (left) and home range overlap (right) on Wolbachia  sharing probability. Points represent pairs of host species that either share (1) or do not share (0) the sameWolbachia strain; the thick blue line represents the mean predicted effect from our Wolbachia  sharing GAMMs. The light blue ribbon represents the 95% confidence intervals of that effect. Phylogenetic distance is the sum of the branch lengths, i.e. the estimated numbers of substitutions derived from the Maximum Likelihood tree. Sharing decreased with both phylogenetic and geographic distance, but the phylogenetic effect was significant and much steeper.