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]
           Clade neomura Cavalier-Smith, 1987
             [Domain "Archaea" Woese et al. 1990 stat. inval. [paraphyletic]] see Domain Archaea Woese et al. 2024
               [Superphylum TACK Guy and Ettema 2011] see Kingdom Thermoproteati Guy and Ettema 2024
                 [Phylum "Crenarchaeota" Garrity and Holt 2002 stat. inval.] see Phylum Thermoproteota Garrity and Holt 2021
                   [Class "Candidatus Aigarchaeota" [monotypic]] see Phylum Aigarchaeota Nunoura et al. 2011
                     1 Genus "Candidatus Caldiarchaeum" Nunoura et al. 2011 [within unnamed taxon]