ruminiclostridium cellulolyticum ruminiclostridium cellulolyticum ruminiclostridium cellulolyticum is an anaerobic, motile, gram-positive bacterium. it is the most cellulolytic bacteria. ruminiclostridium cellulolyticum scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: oscillospiraceae genus: ruminiclostridium species: r. cellulolyticum binomial name ruminiclostridium cellulolyticum(petitdemange et al. 1984) zhang et al. 2018 synonyms clostridium cellulolyticum