Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Bacillotaᵀ Gibbons and Murray 2021
                 Class Bacilliᵀ Ludwig et al. 2010
                   Order Caryophanalesᵀ Peshkoff 1939 (Approved Lists 1980)
                     Family Alicyclobacillaceae da Costa and Rainey 2010
                       1 Genus Alicyclobacillusᵀ Wisotzkey et al. 1992
                       2 Genus Collibacillus Jojima et al. 2023
                       3 Genus Effusibacillus Watanabe et al. 2014
                       4 Genus Ferroacidibacillus Johnson et al. 2023
                       5 Genus Fodinisporobacter Jiang et al. 2024
                       6 Genus Kyrpidia Klenk et al. 2012 [monotypic]
                       7 Genus Sulfoacidibacillus Johnson et al. 2023
                       8 Genus Tumebacillus Steven et al. 2008