Fig. 2

Wolbachia neighbour-joining (NJ) tree constructed with the Wolbachia surface protein gene (wsp). All analysed sequences generated from this study (bold) were broadly classified into Wolbachia supergroups A or B and clustered into 12 putative strains (‘Wol 1’–‘Wol 12’). The number of sequences of each putative strain is indicated within parentheses. Also included are 54 sequences obtained from GenBank. Taxa are labelled as the host from which the Wolbachia strain was isolated, followed by the strain name. The NJ tree was mid rooted due to a lack of appropriate outgroups [45]. Bootstrap probability (generated with 1000 replicates) higher than 50% is indicated on the tree. Genbank accession number of each sequence is indicated within brackets