azonexus fungiphilus azonexus fungiphilus azonexus fungiphilus is a species of bacteria. it is a root bacteria and together with azonexus caeni is one of the two species in the genus. azonexus fungiphilus scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: rhodocyclales family: rhodocyclaceae genus: azonexus species: azonexus fungiphilusreinhold-hurek & hurek, 2000