paenibacillus durus paenibacillus durus paenibacillus durus is a bacterial species belonging to the bacillota. paenibacillus durus scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: paenibacillaceae genus: paenibacillus species: p. durus binomial name paenibacillus durus(smith and cato 1974) collins et al. 1994 synonyms clostridium durum smith and cato 1974 paenibacillus durum (smith and cato 1974) collins et al. 1994 paenibacillus azotofixans seldin et al. 1984