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 "Proteobacteria" Craig et al. 2010 stat. inval.]
               [Phylum "Zetaproteobacteria" "Anantharaman et al. 2016" nom. nud. [monotypic]]
                 [Class "Candidatus Zetaproteobacteria"ᵀ Emerson et al. 2007 nom. pro-inval. [monotypic]]
                   1 [Order "Mariprofundales" Emerson et al. 2007 nom. ined. [monotypic]] see Order Mariprofundales Hördt et al. 2020