organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990
     Phylum Methaneocreatrices Margulis and Schwartz 1982 see Phylum Euryarchaeota Garrity and Holt 2001
       Genus Methanobacillus
       1 Genus Methanosarcina Kluyver and van Niel 1936 (Approved Lists 1980)
       2 Genus Methanobacterium Kluyver and van Niel 1936 (Approved Lists 1980)
       3 Genus Methanococcus Kluyver and van Niel 1936 (Approved Lists 1980)