thermoanaerobacterium thermosaccharolyticum thermoanaerobacterium thermosaccharolyticum thermoanaerobacterium thermosaccharolyticum, previously known as clostridium thermosaccharolyticum, is a bacterium belonging to the bacillota. it is an anaerobic, motile, gram-positive bacterium. thermoanaerobacterium thermosaccharolyticum scientific classification domain: bacteria phylum: bacillota class: clostridia order: thermoanaerobacterales family: thermoanaerobacterales family iii. incertae sedis genus: thermoanaerobacterium species thermoanaerobacterium thermosaccharolyticum collins et al., 1994 synonyms clostridium thermosaccharolyticum mcclung 1935