azoarcus toluclasticus azoarcus toluclasticus azoarcus toluclasticus is a gram negative bacterium from the genus of azoarcus. azoarcus toluclasticus scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: rhodocyclales family: rhodocyclaceae genus: azoarcus species: a. toluclasticus binomial name azoarcus toluclasticussong et al. 1999 type strain atcc 700605, mf63