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)
           1 Family Bacillaceae Fischer 1895 (Approved Lists 1980)
           2 Family Planococcaceae Krasil'nikov 1949 (Approved Lists 1980)
           3 Family Caryophanaceae Peshkoff 1939 (Approved Lists 1980) [monotypic] see Family Planococcaceae Krasil'nikov 1949 (Approved Lists 1980)
           4 Family "Listeriaceae" Garrity and Holt 2001 nom. nud. see Family Listeriaceae Ludwig et al. 2010
           5 Family "Staphylococcaceae" Schleifer & Bell, 2010 see Family Staphylococcaceae Schleifer and Bell 2010
           6 Family "Sporolactobacillaceae" Ludwig et al., 2010 see Family Sporolactobacillaceae Ludwig et al. 2010
           7 Family "Paenibacillaceae" De Vos et al., 2010 see Family Paenibacillaceae De Vos et al. 2010
           8 Family "Alicyclobacillaceae" da Costa & Rainey, 2010 see Family Alicyclobacillaceae da Costa and Rainey 2010
           9 Family "Thermoactinomycetaceae" [monotypic] see Family Thermoactinomycetaceae Matsuo et al. 2006