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 Euryarchaeota Garrity and Holt 2002 stat. inval. see Kingdom Methanobacteriati (Garrity and Holt 2023) Oren and Göker 2024
             01 Genus Methanobrevibacter Balch and Wolfe 1981
             02 Genus Methanococcoides Sowers and Ferry 1985
             03 Genus Methanocorpusculum Zellner et al. 1988
             04 Genus Methanoculleus Maestrojuán et al. 1990
             05 Genus Methanogenium Romesser et al. 1981
             06 Genus Methanohalophilus Paterek and Smith 1988
             07 Genus Methanolobus König and Stetter 1983
             08 Genus Methanomicrobium Balch and Wolfe 1981
             09 Genus Methanoplanus Wildgruber et al. 1984
             10 Genus Methanopyrus Kurr et al. 1992
             11 Genus Methanosphaera Miller and Wolin 1985
             12 Genus Methanospirillum Ferry et al. 1974 (Approved Lists 1980)
             13 methanogens see Phylum Euryarchaeota Garrity and Holt 2002 stat. inval.
             14 halophils see Class Halobacteria Grant et al. 2001 nom. inval.