gramella portivictoriae gramella portivictoriae gramella portivictoriae is a gram-negative, strictly aerobic and rod-shaped bacterium from the genus of gramella which has been isolated from marine sediments. gramella portivictoriae scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: flavobacteriaceae genus: gramella species: g. portivictoriae binomial name gramella portivictoriaelau et al. 2005 type strain ust040801-001