Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Phylum "Deltaproteobacteria" Kuever et al., 2006 [polyphyletic]
               Class Deltaproteobacteriaᵀ Kuever et al. 2006
                 Order Desulfobacterales Kuever et al. 2006
                   Family Nitrospinaceae Garrity et al. 2006 [monotypic]
                     Genus Nitrospinaᵀ Watson and Waterbury 1971 (Approved Lists 1980) [monotypic]
                       1 Nitrospina gracilisᵀ Watson and Waterbury 1971 (Approved Lists 1980)