roseitalea porphyridii roseitalea porphyridii roseitalea porphyridii is a gram-negative and strictly aerobic bacterium from the genus roseitalea that has been isolated from the alga porphyridium marinum in korea. roseitalea porphyridii scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: phyllobacteriaceae genus: roseitalea species: r. porphyridii binomial name roseitalea porphyridiihyeon et al. 2017 type strain jcm 31538, kacc 18807, ma7-20