carboxydothermus siderophilus carboxydothermus siderophilus carboxydothermus siderophilus is a thermophilic and anaerobic bacterium from the genus of carboxydothermus which has been isolated from a hot spring in kamchatka in russia. carboxydothermus siderophilus scientific classification domain: bacteria phylum: bacillota class: clostridia order: clostridiales family: peptococcaceae genus: carboxydothermus species: c. siderophilus binomial name carboxydothermus siderophilusslepova et al. 2009 type strain 1315, dsm 21278, vkm b-2474, vkpm 9905 b