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. 2024 [paraphyletic]
               Kingdom Promethearchaeati Imachi et al. 2024 [monotypic]
                 Phylum Promethearchaeotaᵀ Imachi et al. 2024 [paraphyletic]
                   Class Promethearchaeiaᵀ Imachi et al. 2024 [monotypic]
                     Order Promethearchaealesᵀ Imachi et al. 2024 [monotypic]
                       Family Promethearchaeaceaeᵀ Imachi et al. 2024
                         1 Genus "Candidatus Harpocratesius" Wu et al. 2022 nom. pro-inval.
                         2 Genus "Candidatus Lokiarchaeum" corrig. Spang et al. 2020
                         3 Genus Promethearchaeumᵀ Imachi et al. 2024