brachymonas denitrificans brachymonas denitrificans brachymonas denitrificans is a nonmotile, gram-negative, aerobic, chemo-organotrophic bacterium from the genus brachymonas and family comamonadaceae. b. denitrificans has no flagella and its colonies are cream to pale yellow. brachymonas denitrificans scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: comamonadaceae genus: brachymonas species: b. denitrificans binomial name brachymonas denitrificanshiraishi et al. 1995 type strain as-p1, ccug 45365, dsm 15123, hiraishi as-p1, jcm 9216