roseivirga ehrenbergii roseivirga ehrenbergii roseivirga ehrenbergii is a gram-negative, heterotrophic, strictly aerobic and non-motile bacterium from the genus of roseivirga which has been isolated from the green alga ulva fenestrata from the sea of japan. roseivirga ehrenbergii scientific classification domain: bacteria phylum: bacteroidota class: cytophagia order: cytophagales family: roseivirgaceae genus: roseivirga species: r. ehrenbergii binomial name roseivirga ehrenbergiinedashkovskaya et al. 2005 type strain jcm 13514, kctc 12282, kmm 6017, lmg 22567