filobacillus filobacillus filobacillus is a genus of bacteria within the phylum bacillota. it contains the type and only species, filobacillus milensis, though other species and strains have been isolated. species in this genus are generally halotolerant. filobacillus scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: bacillaceae genus: filobacillusschlesner et al. 2001 type species filobacillus milensis species f. milensis