Bacteria
Pseudomonadales
Brucella
Burkholderiales
Gamma Proteobacteria
Campylobacterales
Legionellales | Xanthomonadales
Alfa Proteobacteria
Enterobacteriales
Epsilon Proteobacteria
Beta Proteobacteria
Neisseria gonorrhoeae
Vibrionales | Delta Proteobacteria
Thiomargarita |