Some major phylogenetic divisions within the eubacteria and representative genera are listed below.
Additional divisions continue to be found.
Chlorophyll-Based Photosynthesis Five of the major phylogenetic groups of Bacteria listed above include photosynthetic genera. Given the complexity of the process, it is unlikely to have been invented multiple times. This suggests, but does not prove, that chlorophyll-based photosynthesis was invented after these groups diverged from the rest of the Bacterial lineages. One of the great triumphs of molecular phylogenetic analyses has been the demonstration that the chloroplast genome is of bacterial origin. Because of its loss of autonomy, the organelle is maintained by the host cell.