prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Firmicutes" corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       Class Bacilli Ludwig et al. 2010
         Order Bacillales Prévot 1953 (Approved Lists 1980)
           Family Bacillaceae Fischer 1895 (Approved Lists 1980)
             01 Genus Aeribacillus Miñana-Galbis et al. 2010
             02 Genus Alkalibacillus Jeon et al. 2005
             03 Genus Allobacillus Sheu et al. 2011
             04 Genus Alteribacillus Didari et al. 2012
             05 Genus Amphibacillus Niimura et al. 1990
             06 Genus Anaerobacillus Zavarzina et al. 2010
             07 Genus Anoxybacillus Pikuta et al. 2000
             08 Genus Aquibacillus Amoozegar et al. 2014
             09 Genus Aquisalibacillus Márquez et al. 2008
             10 Genus Bacillus Cohn 1872 (Approved Lists 1980)
             11 Genus Caldalkalibacillus Xue et al. 2006
             12 Genus Caldibacillus Coorevits et al. 2012
             13 Genus Calditerricola Moriya et al. 2011
             14 Genus Cerasibacillus Nakamura et al. 2004
             15 Genus Compostibacillus Yu et al. 2015
             16 Genus Domibacillus Seiler et al. 2013
             17 Genus Falsibacillus Zhou et al. 2009
             18 Genus Filobacillus Schlesner et al. 2001
             19 Genus Geobacillus Nazina et al. 2001
             20 Genus Gracilibacillus Wainø et al. 1999
             21 Genus Halalkalibacillus Echigo et al. 2007
             22 Genus Halobacillus Spring et al. 1996
             23 Genus Halolactibacillus Ishikawa et al. 2005
             24 Genus Hydrogenibacillus Kämpfer et al. 2013
             25 Genus Lentibacillus Yoon et al. 2002
             26 Genus Lysinibacillus Ahmed et al. 2007
             27 Genus Marinococcus Hao et al. 1985
             28 Genus Melghiribacillus Addou et al. 2015
             29 Genus Microaerobacter Khelifi et al. 2011
             30 Genus Natribacillus Echigo et al. 2012
             31 Genus Natronobacillus Sorokin et al. 2009
             32 Genus Oceanobacillus Lu et al. 2002
             33 Genus Ornithinibacillus Mayr et al. 2006
             34 Genus Paraliobacillus Ishikawa et al. 2003
             35 Genus Paucisalibacillus Nunes et al. 2006
             36 Genus Pelagibacillus Kim et al. 2007 see Genus Terribacillus An et al. 2007
             37 Genus Pelagirhabdus Sultanpuram et al. 2016
             38 Genus Piscibacillus Tanasupawat et al. 2007
             39 Genus Pontibacillus Lim et al. 2005
             40 Genus Psychrobacillus Krishnamurthi et al. 2011
             41 Genus Saccharococcus Nystrand 1984
             42 Genus Salibacillus Wainø et al. 1999 see Genus Virgibacillus Heyndrickx et al. 1998
             43 Genus Salimicrobium Yoon et al. 2007
             44 Genus Salinibacillus Ren and Zhou 2005
             45 Genus Salirhabdus Albuquerque et al. 2007
             46 Genus Salisediminibacterium Jiang et al. 2012
             47 Genus Saliterribacillus Amoozegar et al. 2013
             48 Genus Salsuginibacillus Carrasco et al. 2007
             49 Genus Sediminibacillus Carrasco et al. 2008
             50 Genus Sinibacillus Yang and Zhou 2014
             51 Genus Streptohalobacillus Wang et al. 2011
             52 Genus Tenuibacillus Ren and Zhou 2005
             53 Genus Terribacillus An et al. 2007
             54 Genus Thalassobacillus García et al. 2005
             55 Genus Virgibacillus Heyndrickx et al. 1998
             56 Genus Viridibacillus Albert et al. 2007
             57 Genus Vulcanibacillus L'Haridon et al. 2006