tolumonas auensis tolumonas auensis tolumonas auensis is a gram-negative, rod-shaped bacterium in the genus tolumonas. it has been studied as a biological producer of toluene from phenylalanine and other phenyl precursors. tolumonas auensis scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: aeromonadales family: aeromonadaceae genus: tolumonas species: t. auensis binomial name tolumonas auensisfischer-romero et al., 1996