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