legionella rubrilucens legionella rubrilucens legionella rubrilucens is a gram-negative bacterium from the genus legionella which was isolated from tap water in los angeles, hot spring water in niigata in japan, and a patient who suffered from pneumonia. legionella rubrilucens scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: legionellales family: legionellaceae genus: legionella species: l. rubrilucens binomial name legionella rubrilucensbrenner et al. 1985 type strain atcc 35304, ccug 29671, cip 103848, dsm 11884, jcm 7565, nctc 11987, wa-270a-c2