is a species of the class Betaproteobacteria in the family Rhodocyclaceae and order Rhodocyclales.
Azoarcus anaerobius
Azoarcus buckelii
Azoarcus communis
Azoarcus evansii
Azoarcus indigens
Azoarcus toluclasticus
Azoarcus tolulyticus
Azoarcus toluvorans