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 Nanobdellati Rinke et al. 2024
                 Phylum "Candidatus Altarchaeota" corrig. Seitz et al. 2023 [monotypic]
                   Class "Candidatus Altarchaeia"ᵀ Rinke et al. 2021 nom. pro-inval. [monotypic]
                     1 Order "Candidatus Altarchaeales"ᵀ corrig. Probst et al. 2020 [monotypic]