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
                   Class Methanosuratincolia Wu et al. 2025 [monotypic]
                     Order Methanosuratincolalesᵀ Wu et al. 2025
                       Family Methanosuratincolaceaeᵀ Wu et al. 2025
                         1 Genus "Candidatus Methanosuratincola" corrig. Vanwonterghem et al. 2020
                         2 Genus Methanosuratincolaᵀ Wu et al. 2025