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 Betaproteobacteria Garrity et al. 2006
                   [Order "Candidatus Procabacteriales" (sic) Garrity et al. 2002 nom. pro-inval. [monotypic]] see Order Procaibacterales corrig. Garrity et al. 2002 nom. nud.
                     1 [Family "Procabacteriaceae"ᵀ Garrity et al. 2002 [monotypic]] see Family Procaibacteraceae corrig. Garrity et al. 2002 nom. nud.