[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryota
     Kingdom Bacteria Cavalier-Smith 2002 - bacteria see Domain Bacteria Woese et al. 1990
       Subkingdom Negibacteria Cavalier-Smith 2002 - negibacteria see Domain Bacteria Woese et al. 1990
         Phylum Proteobacteria Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
           Class Betaproteobacteria Garrity et al. 2006
             Order "Procabacteriales" Garrity et al., 2003