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. 1990 stat. inval. [paraphyletic?]] see Domain Bacteria Woese et al. 2024
             [Superphylum "Fibrobacteres-Chlorobi-Bacteroidetes (FCB)" Gupta 2004]
               [Phylum "Calditrichaeota" Kublanov et al. 2017 stat. inval. [monotypic]] see Phylum Calditrichota Kublanov et al. 2021
                 1 Class "Calditrichae"ᵀ Kublanov et al. 2017 [monotypic]