Phylogenetic tree based on aligned complete sequences of the <i>rrs</i> (16SrRNA) gene and constructed by the UPGMA method.

<p>The numbers in the nodes represent bootstrap values. The tree shows the position of <i>Diplorickettsia massiliensis</i> (isolate 20B) among recognized bacterial species and <i>rrs</i> genes amplified from uncultured bacteria and environmental samples (Genbank). The host (if any) or the source of amplification is indicated in the brackets; GenBank accession number is indicated at the end of the line for each sequence.