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]
           Domain Bacteria Woese et al. 2024
             Kingdom Pseudomonadati (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Nitrospinota Lücker et al. 2021
                 Class Nitrospiniaᵀ Lücker et al. 2022 [monotypic]
                   Order Nitrospinalesᵀ Lücker et al. 2022 [monotypic]
                     Family Nitrospinaceaeᵀ Garrity et al. 2006
                       1 Genus Nitrospinaᵀ Watson and Waterbury 1971 (Approved Lists 1980) [monotypic]
                       2 Genus "Candidatus Nitrohelix" Mueller et al. 2022
                       3 Genus "Candidatus Nitronauta" Mueller et al. 2022