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 Elusimicrobiota Geissinger et al. 2021
                 Class Elusimicrobiaᵀ Geissinger et al. 2010
                   Order Elusimicrobialesᵀ Geissinger et al. 2010
                     Family Elusimicrobiaceaeᵀ Geissinger et al. 2010
                       1 Genus Elusimicrobiumᵀ Geissinger et al. 2010 [monotypic]
                       2 Genus Parelusimicrobium Mies et al. 2025
                       3 Genus "Candidatus Avelusimicrobium" Gilroy et al. 2022
                       4 Genus "Candidatus Proelusimicrobium" Mies et al. 2025 nom. pro-inval.
                       5 Genus "Candidatus Pseudelusimicrobium" Mies et al. 2025 nom. pro-inval.