Domain Bacteria Woese et al. 1990
Count: [*] *
   Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
  Count: -
     Class "Bacilli" Garrity et al. 2001 nom. ined. see Class Bacilli Ludwig et al. 2010
    Count: [*] *
       Order Bacillales Prévot 1953 (Approved Lists 1980)
      Count: [*] *
         Family Bacillaceae Fischer 1895 (Approved Lists 1980)
        Count: [*] *
           Genus Gracilibacillus Wainø et al. 1999
          Count: -