[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryota Margulis 1974 nom. nud.
     Kingdom Archaea Woese et al. 1990 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 Class "Aigarchaeota" [monotypic] see Phylum Aigarchaeota Nunoura et al. 2011
         2 Class "Korarchaeota" [monotypic] see Phylum Korarchaeota Ludwig and Klenk 2001 nom. pro-inval.
         3 Class "Thaumarchaeota" [monotypic] see Phylum Thaumarchaeota Brochier-Armanet et al. 2008 nom. pro-inval.
         4 Class Thermoprotei Reysenbach 2002