FIG. 2.

ML phylogeny of the bacteriophage ORF7 nucleotide sequences. The tree is midpoint rooted, and numbers denote ML bootstrap values and Bayesian posterior probabilities (in bold). Taxa names denote host arthropod species, Wolbachia strain, and ORF7 haplotype. Pairs of haplotypes in shaded boxes illustrate putative lateral transfer events in field specimens collected in this study. Bold taxa represent previously published examples of lateral transfer through laboratory segregation experiments. The three group labels (I–III) were assigned according to the nomenclature in Bordenstein and Wernegreen (2004).