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 Nitrososphaeria Stieglmeier et al. 2014
                     Order Nitrososphaeralesᵀ Stieglmeier et al. 2014
                       Family Nitrososphaeraceaeᵀ Stieglmeier et al. 2014 [monotypic]
                         Genus Nitrososphaeraᵀ Stieglmeier et al. 2014 [monotypic]
                           1 Nitrososphaera viennensisᵀ Stieglmeier et al. 2014