Phylogenetic tree based on the 16S rRNA gene sequence of the Oryctes agamemnon endosymbiont in relation to closest matches from NCBI GenBank database with corresponding accession numbers given in parentheses. The tree was constructed by the neighbor-joining method using Kimura’s correction for multiple substitutions. Percent bootstrap values (1000 resamplings) of their level of support are shown at the individual nodes. The scale bar represents 0.02 substitutions per nucleotide position. The data sets supporting the results concerning phylogenetic analysis are available in the Dryad Digital Repository: http://dx.doi.org/10.5061/dryad.59h51.