clostridium estertheticum clostridium estertheticum clostridium estertheticum is an anaerobic, psychrophilic, motile, spore-forming gram-positive bacterium. clostridium estertheticum scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: clostridiaceae genus: clostridium species: c. estertheticum binomial name clostridium estertheticumcollins et al. 1993 emend. spring et al. 2003 subspecies subsp. estertheticum subsp. laramiense synonyms clostridium laramiense