achromobacter ruhlandii achromobacter ruhlandii achromobacter ruhlandii is a gram-negative bacterium included in the order burkholderiales. achromobacter ruhlandii scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: alcaligenaceae genus: achromobacter binomial name achromobacter ruhlandiiyabuuchi and yano 1981 (non achromobacter bergey et al. 1923) synonyms hydrogenomonas ruhlandii packer and vishniac 1955 pseudomonas ruhlandii (packer and vishniac 1955) davis et al. 1969 alcaligenes ruhlandii (packer and vishniac 1955) aragno and schlegel 1977