desulfurobacterium thermolithotrophum desulfurobacterium thermolithotrophum desulfurobacterium thermolithotrophum is a species of autotrophic, sulphur-reducing bacterium isolated from a deep-sea hydrothermal vent. it is the type species of its genus, being thermophilic, anaerobic, gram-negative, motile and rod-shaped, with type strain bsat (= dsm 11699t). desulfurobacterium thermolithotrophum scientific classification domain: bacteria phylum: aquificota class: "desulfurobacteriia" order: desulfurobacteriales family: desulfurobacteriaceae genus: desulfurobacterium species: desulfurobacterium thermolithotrophuml'haridon et al. 1998