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. 1990 stat. inval. [paraphyletic?]] see Domain Bacteria Woese et al. 2024
             [Phylum "Proteobacteria" Garrity and Holt 2001 nom. nud.] see Phylum Proteobacteria Garrity et al. 2005 stat. inval.
               [Class "Gammaproteobacteria" "Garrity and Holt 2001" nom. nud.] see Class Gammaproteobacteria Garrity et al. 2005
                 [Order "Thiotrichales" "Garrity and Holt 2001" nom. nud.] see Order Thiotrichales Garrity et al. 2005 nom. illeg.
                   [Family "Piscirickettsiaceae" "Garrity and Holt 2001" nom. nud.] see Family Piscirickettsiaceae Fryer and Lannan 2005