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
     Kingdom Bacteria (Cohn 1870) Cavalier-Smith 1983 [paraphyletic] - bacteria see Kingdom Bacteria Cavalier-Smith 2002
       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
           Phylum Mendosicutes Gibbons and Murray 1978 see Domain Archaea Woese et al. 1990
             Subphylum Euryarcheota (C.R. Woese et al. 1990) Cavalier-Smith 1998 see Phylum Euryarchaeota Garrity and Holt 2001
               Infraphylum Halomebacteria Cavalier-Smith 1986 see Phylum Euryarchaeota Garrity and Holt 2001
                 Genus Methanococcus Kluyver and van Niel 1936 (Approved Lists 1980)
                   Methanococcus jannaschii Jones et al. 1984 see Methanocaldococcus jannaschii (Jones et al. 1984) Whitman 2002