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 "Proteobacteria" Garrity and Holt 2001] see Phylum Proteobacteria Garrity et al. 2005
               1.1 [Class "Alphaproteobacteria" Garrity and Holt 2001 nom. nud.] see Class Alphaproteobacteria Garrity et al. 2006
               1.1.0 ["Alpha Group"] see Class Alphaproteobacteria Garrity et al. 2006
               1.1.0 [Class "Alphabacteria" Cavalier-Smith 1992] see Infraphylum Alphabacteria (Cavalier-Smith 1992) Cavalier-Smith 1998
               1.2.1 [Class "Betaproteobacteria" Garrity et al. 2001 nom. ined.] see Class Betaproteobacteria Garrity et al. 2006
               1.2.1.0 ["Beta Group"] see Class Betaproteobacteria Garrity et al. 2006
               1.2.2 [Class "Gammaproteobacteria" nom. inval.] see Class Gammaproteobacteria Garrity et al. 2005
               1.2.2.0 ["Gamma Group"] see Class Gammaproteobacteria Garrity et al. 2005
               1.n [Subphylum Rhodobacteria Cavalier-Smith 1998] see Phylum Proteobacteria Garrity and Holt 2001
               2.1 [Class "Deltaproteobacteria" Garrity et al. 2001 nom. ined.] see Class Deltaproteobacteria Kuever et al. 2006
               2.1.0 ["Delta Group"] see Class Deltaproteobacteria Garrity et al. 2001 nom. ined.
               2.2 [Class "Epsilonproteobacteria" nom. inval.] see Class Epsilonproteobacteria Garrity et al. 2006
               2.n [Subphylum Thiobacteria Cavalier-Smith 1998] see Phylum Proteobacteria Garrity et al. 2005