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 Endomicrobiia corrig. Zheng et al. 2018 [monotypic]
                   Order Endomicrobialesᵀ Zheng et al. 2018
                     Family Endomicrobiaceaeᵀ Zheng et al. 2018
                       Genus "Candidatus Ruminimicrobiellum" Mies and Brune 2024 nom. pro-inval.