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 Clostridia Rainey 2010
                   Order Eubacteriales Buchanan 1917 (Approved Lists 1980)
                     Family Eubacteriaceae Ludwig et al. 2010
                       01 Genus Acetobacterium Balch et al. 1977 (Approved Lists 1980)
                       02 Genus Alkalibacter Garnova et al. 2005 [monotypic]
                       03 Genus Alkalibaculum Allen et al. 2010 [monotypic]
                       04 Genus Anaerofustis Finegold et al. 2004 [monotypic]
                       05 Genus Eubacteriumᵀ Prévot 1938 (Approved Lists 1980)
                       06 Genus Gallibacter Zenner et al. 2021
                       07 Genus Garciella Miranda-Tello et al. 2003 [monotypic]
                       08 Genus Pseudoramibacter Willems and Collins 1996 [monotypic]
                       09 Genus Rhabdanaerobium Liu et al. 2017
                       10 Genus Senimuribacter Afrizal et al. 2025
                       11 Genus "Garciaella" Lavania et al. 2012 nom. inval.
                       12 Genus "Intestinibacillus" Ricaboni et al. 2017 nom. inval.
                       13 Genus "Paralentihominibacter" Huang et al. 2024 nom. inval.
                       14 Genus "Zhongjingia" Huang et al. 2024 nom. inval.