pseudomonas knackmussii pseudomonas knackmussii pseudomonas knackmussii is a gram-negative, polarly flagellated, motile, short rod bacterium isolated from a sewage treatment plant in göttingen, germany. it is the first bacterium used to study the degradation of haloaromatic compounds. it is named after hans-joachim knackmuss. the type strain is dsm 6978. pseudomonas knackmussii scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pseudomonadales family: pseudomonadaceae genus: pseudomonas species: p. knackmussii binomial name pseudomonas knackmussiistoltz, et al. 2007