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 Nitrospirota Garrity and Holt 2021
                 Class Nitrospiriaᵀ Garrity and Holt 2022 [monotypic]
                   Order Nitrospiralesᵀ Garrity and Holt 2022
                     Family Nitrospiraceaeᵀ Garrity and Holt 2022
                       Genus Nitrospiraᵀ Watson et al. 1986
                         1 Nitrospira marinaᵀ Watson et al. 1986
                         2 Nitrospira moscoviensis Ehrich et al. 2001
                         3 "Candidatus Nitrospira bockiana" Lebedeva et al. 2008