This highlights the difficulty in depicting subgroups within the RYD 16S-group using the internal branching order (Fig. 1). The bootstrap value (100 %) at the actual node indicates statistical support for BGWL and BraWL phytoplasmas sharing a common ancestral node. However, 16S rDNA sequence identity alone may not be enough to classify RYD phytoplasma as an independent species-level taxon.