geofilum rubicundum geofilum rubicundum geofilum rubicundum is a facultatively anaerobic bacterium from the genus of geofilum which has been isolated from deep subseafloor sediments from the shimokita peninsula from japan. geofilum rubicundum scientific classification domain: bacteria phylum: bacteroidota class: bacteroidia order: bacteroidales family: marinilabiliaceae genus: geofilum species: g. rubicundum binomial name geofilum rubicundummiyazaki et al. 2012 type strain jcm 15548, ncimb 14482, jam-ba0501