roseobacter litoralis roseobacter litoralis roseobacter litoralis is a species of aerobic pink-pigmented bacteria. it contains bacteriochlorophyll a. it contains spheroidenone, does not synthesize bacteriochlorophyll anaerobically, but shows aerobic phototrophic activity. it is also considered a photosynthetic marine bacterium. cells are ovoid or rod-shaped and motile by subpolar flagella. r. litoralis does not reduce nitrate, while r. dentrificans does. r. litoralis can be found in marine seaweed. roseobacter litoralis scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: roseobacter species: r. litoralis binomial name roseobacter litoralisshiba, 1991