Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           [Superkingdom Prokaryonta] see Superkingdom Prokarya
             [Suprakingdom Neobacteria] see Domain Bacteria Woese et al. 1990 stat. inval.
               [Kingdom Bacteriobionta] see Domain Bacteria Woese et al. 1990 stat. inval.
                 [Infrakingdom Spirochaetae Garrity & Holt, 2001]
                   1 [Phylum Spirochaetacea]