Domain Bacteria Woese et al. 1990
Status: extant
   Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
  Status: extant
     Class "Bacilli" Garrity et al. 2001 nom. ined. see Class Bacilli Ludwig et al. 2010
    Status: extant
       Order Bacillales Prévot 1953 (Approved Lists 1980)
      Status: extant
         Family Bacillaceae Fischer 1895 (Approved Lists 1980)
        Status: extant
           Genus Amphibacillus Niimura et al. 1990
          Status: extant
           Genus Exiguobacterium Collins et al. 1984
          Status: extant
           Genus Gracilibacillus Wainø et al. 1999
          Status: extant
           Genus Halobacillus Spring et al. 1996
          Status: extant
           Genus Saccharococcus Nystrand 1984
          Status: extant
           Genus Salibacillus Wainø et al. 1999 see Genus Virgibacillus Heyndrickx et al. 1998
          Status: extant
           Genus Virgibacillus Heyndrickx et al. 1998
          Status: extant
           1 Genus Bacillus Cohn 1872 (Approved Lists 1980)
          Status: extant