Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota J.R. Wagner, 2004 [J. Wiemann et al., 2020]
           Domain Bacteria (Haeckel, 1894) C.R. Woese et al., 1990 [paraphyletic?]
             Superphylum "Proteobacteria" J.W. Craig et al., 2010
               Phylum "Gammaproteobacteria" Garrity et al., 2005 [monotypic]
                 Class Gammaproteobacteriaᵀ Garrity et al., 2005
                   Order Acidiferrobacterales Kojima et al., 2015 [monotypic]
                     1 Family Acidiferrobacteraceaeᵀ Kojima et al., 2015