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
             [Class Proteobacteria Stackebrandt et al. 1988 nom. rej.] see Phylum Proteobacteria Garrity and Holt 2001 nom. nud.
               1 [Subclass "alpha"] see Class Alphaproteobacteria "Garrity and Holt 2001" nom. nud.
               3 [Subclass "gamma"] see Class Gammaproteobacteria "Garrity and Holt 2001" nom. nud.