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)
           01 Family Alicyclobacillaceae da Costa and Rainey 2010
           02 Family Bacillaceae Fischer 1895 (Approved Lists 1980)
           03 Family Listeriaceae Ludwig et al. 2010
           04 Family Paenibacillaceae De Vos et al. 2010
           05 Family Pasteuriaceae Laurent 1890 (Approved Lists 1980) [monotypic]
           06 Family Planococcaceae Krasil'nikov 1949 (Approved Lists 1980)
           07 Family Sporolactobacillaceae Ludwig et al. 2010
           08 Family Staphylococcaceae Schleifer and Bell 2010
           09 Family Thermoactinomycetaceae Matsuo et al. 2006
           10 Genus Chungangia Kim et al. 2012, incertae sedis
           11 Genus Desulfuribacillus Sorokin et al. 2014, incertae sedis
           12 Genus Exiguobacterium Collins et al. 1984, incertae sedis
           13 Genus Gemella Berger 1960 (Approved Lists 1980), incertae sedis
           14 Genus Geomicrobium Echigo et al. 2010, incertae sedis
           15 Genus Rummeliibacillus Vaishampayan et al. 2009, incertae sedis
           16 Genus Solibacillus Krishnamurthi et al. 2009, incertae sedis
           17 Genus Thermicanus Gößner et al. 2000, incertae sedis