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 Pseudomonadotaᵀ Garrity et al. 2021
                 Class Oligoflexia Nakai et al. 2014
                   1 Order Bacteriovoracales Hahn et al. 2017
                   2 Order Bdellovibrionales Garrity et al. 2006 [monotypic]
                   3 Order Oligoflexalesᵀ Nakai et al. 2014
                   4 Order Silvanigrellales Hahn et al. 2017 [monotypic]