natribacillus natribacillus natribacillus is a gram-positive, moderately halophilic, alkalitolerant, spore-forming, aerobic and motile genus of bacteria from the family of bacillaceae with one known species (natribacillus halophilus). natribacillus halophilus has been isolated from garden soil from okabe in japan. natribacillus scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: bacillaceae genus: natribacillusechigo et al. 2012 type species natribacillus halophilus species n. halophilus