(Betaproteobacteria) (Betaproteobacteria) is a biological class of the kingdom Bacteria and phylum Proteobacteria.
Burkholderiales
Hydrogenophilales
Methylophilales
Neisseriales
Nitrosomonadales
Procabacteriales
Rhodocyclales
Alphaproteobacteria
Betaproteobacteria
Deltaproteobacteria
Epsilonproteobacteria
Gammaproteobacteria
Zetaproteobacteria