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 Thermoproteati Guy and Ettema 2024
                 Phylum Thermoproteotaᵀ Garrity and Holt 2021
                   01 Genus "Candidatus Cenoporarchaeum" corrig. Zhang et al. 2021
                   02 Genus "Candidatus Gigantothauma" corrig. Muller et al. 2020
                   03 Genus "Candidatus Nitrosodeserticola" Hwang et al. 2022
                   04 Order "Candidatus Geothermarchaeales" Adam et al. 2022 nom. pro-inval.
                   05 Order "Candidatus Nitrosocaldales" De La Torre et al. 2020 [monotypic]
                   06 Class "Candidatus Bathyarchaeia" McGonigle et al. 2019 nom. pro-inval.
                   07 Class "Candidatus Korarchaeia" Rinke et al. 2021 nom. pro-inval.
                   08 Class "Candidatus Methanomethylicia" corrig. Vanwonterghem et al. 2020
                   09 Class Methanosuratincolia Wu et al. 2025 [monotypic]
                   10 Class Nitrososphaeria Stieglmeier et al. 2014
                   11 Class Thermoproteiᵀ Reysenbach 2002
                   12 Class "Tardisphaeria" Prokofeva et al. 2025 nom. inval. [monotypic]