Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
   candidate phyla radiation (CPR) Brown et al. 2015
     1 Phylum Candidatus Saccharibacteria (TM7) (sic) Albertsen et al. 2013 nom. pro-inval.
     2.1 Phylum Candidatus Kazan
     2.2.1 Phylum Candidatus CPR2 Brown et al. 2015
     2.2.2.1.1 Phylum Candidatus Gracilibacteria (BD1–5) (sic) Rinke et al. 2013 nom. pro-inval., stat. inval. see Phylum Altimarinota corrig. Rinke et al. 2023
     2.2.2.1.2 Phylum Candidatus Peregrinibacteria (PER) (sic) Wrighton et al. 2012 nom. pro-inval. see Phylum Peregrinibacteriota corrig. Wrighton et al. 2023 nom. pro-illeg.
     2.2.2.2.1.1 Phylum Candidatus Berkelbacteria (ACD58) (sic) Wrighton et al. 2014 nom. pro-inval.
     2.2.2.2.1.2.1.1 Phylum Candidatus CPR3 Brown et al. 2015
     2.2.2.2.1.2.1.2 Phylum Candidatus WS6 see Phylum Dojkabacteria (sic) Wrighton et al. 2016 nom. pro-inval.
     2.2.2.2.1.2.2.1 Phylum Candidatus WWE3 see Phylum Katanobacteria (sic) Hug et al. 2016 nom. pro-inval.
     2.2.2.2.1.2.2.2 Superphylum Candidatus Microgenomates (OP11) Brown et al. 2015 nom. nud.
     2.2.2.2.2.1 Phylum Candidatus SM2F11 see Phylum Doudnabacteria (sic) Anantharaman et al. 2016 nom. nud.
     2.2.2.2.2.2 Superphylum Candidatus Parcubacteria (OD1) Brown et al. 2015 nom. nud.