geoalkalibacter subterraneus geoalkalibacter subterraneus geoalkalibacter subterraneus is a fe(iii)-reducing, mn(iv)-reducing, strictly anaerobic, bacterium from the genus of geoalkalibacter which has been isolated from the water from the redwash oilfield from redwash in the united states. geoalkalibacter subterraneus scientific classification domain: bacteria phylum: thermodesulfobacteriota class: desulfuromonadia order: desulfuromonadales family: geoalkalibacteraceae genus: geoalkalibacter species: g. subterraneus binomial name geoalkalibacter subterraneusgreene et al. 2009 type strain dsm 23483, jcm 15104, kctc 5626, red1