procaryotes
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum Aquificae Reysenbach 2002 stat. inval. see Phylum Aquificota Reysenbach 2021
       1 Class Aquificae Reysenbach 2001 nom. inval. see Class Aquificae Reysenbach 2002