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
                   1 Family Desulfobacteraceaeᵀ Kuever et al. 2006
                   2 Family Desulfobulbaceae Kuever et al. 2006
                   3 Family Nitrospinaceae Garrity et al. 2006 [monotypic]