Maximum-Likelihood (GTR+G+I model) phylogenetic tree for the concatenated MLST genes of Wolbachia isolates. The solid diamonds indicate the 3 strains isolated from S. exempta in this study. Where known, the names of the host species are given. The scale bar represents a 2% estimated difference in nucleotide sequence. Numbers given at each node correspond to the percentage bootstrap values (for 1000 repetitions). Replicate numbers of <60% were not included in the figure. Cimex lectularius Wolbachia ST-8 from Supergroup F is used as an outgroup.