pseudoalteromonas bacteriolytica pseudoalteromonas bacteriolytica pseudoalteromonas bacteriolytica is a marine bacterium that causes red spot disease of saccharina japonica (species synonym laminaria japonica). pseudoalteromonas bacteriolytica scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: pseudoalteromonadaceae genus: pseudoalteromonas binomial name pseudoalteromonas bacteriolyticasawabe et al., 1998 synonyms pseudomonas bacteriolyticasawabe et al.