We understand why the reviewer would think that that would be beneficial. However, one has to keep in mind that we were not constructing a phylogenetic tree for all cyanobacteria but for single genera. In this case it is preferential to use a sister group that is more closely related to gain resolution within that group. e.g., Hedtke, S.M. ; Townsend, T.M. ; Hillis, D.M. Resolution of phylogenetic conflict in large data sets by increased taxon sampling. Syst. Biol. 2006, 55, 522–529. Moreover, for the sake of the barcoding analyses, the choice of the outgroup will not affect the results, given that it will not change the relationships towards the tips of the tree.
We thus only briefly discuss names and taxonomy in our analysis.