Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       Class "Bacilli" Garrity et al. 2001 nom. ined. see Class Bacilli Ludwig et al. 2010
         Order Bacillales Prévot 1953 (Approved Lists 1980)
           Family Bacillaceae Fischer 1895 (Approved Lists 1980)
             1 Genus Bacillus Cohn 1872 (Approved Lists 1980)
             2 Genus Amphibacillus Niimura et al. 1990
             3 Genus Anoxybacillus Pikuta et al. 2000
             4 Genus Exiguobacterium Collins et al. 1984
             5 Genus Gracilibacillus Wainø et al. 1999
             6 Genus Halobacillus Spring et al. 1996
             7 Genus Saccharococcus Nystrand 1984
             8 Genus Salibacillus Wainø et al. 1999 see Genus Virgibacillus Heyndrickx et al. 1998
             9 Genus Virgibacillus Heyndrickx et al. 1998