clostridium cavendishii clostridium cavendishii clostridium cavendishii is a gram-positive, aerotolerant, anaerobic, spore-forming and motile hydrogen-producing bacterium from the genus clostridium which has been isolated from contaminated groundwater in the united states. clostridium cavendishii scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: clostridiaceae genus: clostridium species: c. cavendishii binomial name clostridium cavendishiibowman et al. 2010 type strain bl-28, dsm 21758, nrrl b-51352