robiginitalea biformata robiginitalea biformata robiginitalea biformata is a gram-negative, chemoheterotrophic and non-motile bacterium from the genus of robiginitalea which has been isolated from the sargasso sea. robiginitalea biformata scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: flavobacteriaceae genus: robiginitalea species: r. biformata binomial name robiginitalea biformatacho and giovannoni 2004