life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Empire Prokaryota (Dougherty 1957) Allsopp 1969 [monotypic] see Domain Bacteria Woese et al. 1990 stat. inval.
     Kingdom Bacteria Cavalier-Smith 1998 nom. inval. [paraphyletic] - bacteria see Kingdom Bacteria Cavalier-Smith 2002 stat. inval.
       Subkingdom Unibacteria Cavalier-Smith 1998 [paraphyletic?] see Subkingdom Unibacteria Cavalier-Smith 2002
         Infrakingdom Archaebacteria (Woese and Fox 1977) Cavalier-Smith 1998 [monotypic] see Domain Archaea Woese et al. 1990 stat. inval.
           Phylum Mendosicutes Gibbons and Murray 1978 see Domain Archaea Woese et al. 1990 stat. inval.
             Subphylum Euryarcheota (C.R. Woese et al. 1990) Cavalier-Smith 1998 see Phylum Euryarchaeota Garrity and Holt 2002 stat. inval.
               Infraphylum Halomebacteria Cavalier-Smith 1986 see Phylum Euryarchaeota Garrity and Holt 2002 stat. inval.
                 1 Genus Halobacterium Elazari-Volcani 1957 (Approved Lists 1980)
                 2 Genus Methanospirillum Ferry et al. 1974 (Approved Lists 1980)
                 3 Genus Methanococcus Kluyver and van Niel 1936 (Approved Lists 1980)