clostridium cellulofermentans clostridium cellulofermentans clostridium cellulofermentans is a gram-negative and cellulolytic bacterium from the genus of clostridium. clostridium cellulofermentans scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: clostridiaceae genus: clostridium species: c. cellulofermentans binomial name clostridium cellulofermentanshe et al. 1991