Kingdom Bacteria Cavalier-Smith 2002 stat. inval. [paraphyletic?] - bacteria see Domain Bacteria Woese et al. 1990 stat. inval.
   Subkingdom Negibacteria Cavalier-Smith 2002 stat. inval. [paraphyletic?] - negibacteria see Domain Bacteria Woese et al. 1990 stat. inval.
     Infrakingdom Eobacteria Cavalier-Smith 2002 stat. inval. see Domain Bacteria Woese et al. 1990 stat. inval.
       Division Eobacteria Cavalier-Smith 2002 stat. inval. see Phylum Eobacteria Cavalier-Smith 2002 stat. inval.
         Class Hadobacteria Cavalier-Smith 2002 nom. illeg., nom. rej.
           1 Order Thermalesᵀ Rainey and da Costa 2001 nom. inval. see Order Thermales Rainey and da Costa 2002