Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
   candidate phyla radiation (CPR) Brown et al. 2015
     Superphylum Candidatus Microgenomates (OP11) Brown et al. 2015 nom. nud.
       Phylum Candidatus Curtissbacteria (sic) Brown et al. 2015 nom. nud.