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 Pseudomonadati (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Acidobacteriota Thrash and Coates 2021
                 Class Holophagae Fukunaga et al. 2008
                   Order Holophagalesᵀ Fukunaga et al. 2008 [monotypic]
                     Family Holophagaceaeᵀ Fukunaga et al. 2008
                       1 Genus Geothrix Coates et al. 1999 [monotypic]
                       2 Genus Holophagaᵀ Liesack et al. 1995 [monotypic]
                       3 Genus Mesoterricola Itoh et al. 2023
                       4 Genus "Acidiparvus" Wong et al. 2024 nom. inval.