life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokarya see Domain Bacteria Woese et al. 1990 stat. inval.
     Kingdom Bacteria Cavalier-Smith 1998 nom. inval. - bacteria see Kingdom Bacteria Cavalier-Smith 2002 stat. inval.
       Subkingdom Archaea Woese et al. 1990 see Domain Archaea Woese et al. 1990 stat. inval.
         Division Mendosicutes Murray 1984 see Domain Archaea Woese et al. 1990 stat. inval.
           Phylum Crenarchaeota Garrity and Holt 2002 stat. inval. see Phylum Thermoproteota Garrity and Holt 2021
             1 Genus Acidianus Segerer et al. 1986
             2 Genus Desulfurococcus Zillig and Stetter 1983
             3 Genus Pyrodictium Stetter et al. 1984
             4 Genus Pyrolobus Blöchl et al. 1999
             5 Genus Sulfolobus Brock et al. 1972 (Approved Lists 1980)
             6 Genus Thermococcus Zillig 1983
             7 Genus Thermofilum Zillig and Gierl 1983
             8 Genus Thermoplasma Darland et al. 1970 (Approved Lists 1980)
             9 Genus Thermoproteus Zillig and Stetter 1982