geothermobacter geothermobacter geothermobacter is a thermophilic genus of bacteria from the order desulfuromonadales with one known species (geothermobacter ehrlichii). geothermobacter scientific classification domain: bacteria phylum: thermodesulfobacteriota class: desulfuromonadia order: desulfuromonadales family: geothermobacteraceaewaite et al. 2020 genus: geothermobacterkashefi et al. 2005 type species geothermobacter ehrlichii species g. ehrlichii