sulfobacillus thermotolerans sulfobacillus thermotolerans sulfobacillus thermotolerans is a species of thermotolerant, chemolithotrophic, gram-positive, aerobic, endospore-forming, acidophilic bacterium with type strain kr1t (=vkm b-2339t =dsm 17362t). its cells are straight to slightly curved rods, 0.8–1.2 μm in diameter and 1.5–4.5 μm in length. sulfobacillus thermotolerans scientific classification domain: bacteria phylum: bacillota class: incertae sedis genus: sulfobacillus species: s. thermotolerans binomial name sulfobacillus thermotoleransbogdanova et al. 2006