Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Archaea Woese et al. 2024 [paraphyletic]
               Kingdom Methanobacteriati (Garrity and Holt 2023) Oren and Göker 2024
                 Phylum Methanobacteriotaᵀ Garrity and Holt 2023
                   Class Methanosarcinia Chuvochina et al. 2024
                     Order Methanosarcinalesᵀ Boone et al. 2002
                       Family Methanosarcinaceaeᵀ Balch and Wolfe 1981
                         01 Genus "Candidatus Methanovorans" Chadwick et al. 2022 nom. pro-inval.
                         02 Genus Halomethanococcus Yu and Kawamura 1988
                         03 Genus Methanimicrococcus corrig. Sprenger et al. 2000 [monotypic]
                         04 Genus Methanococcoides Sowers and Ferry 1985
                         05 Genus Methanohalobium Zhilina and Zavarzin 1988 [monotypic]
                         06 Genus Methanohalophilus Paterek and Smith 1988
                         07 Genus Methanolapillus Protasov and Brune 2025
                         08 Genus Methanolobus König and Stetter 1983
                         09 Genus Methanomethylovorans Lomans et al. 2004
                         10 Genus Methanosalsum Boone and Baker 2002 [monotypic]
                         11 Genus Methanosarcinaᵀ Kluyver and van Niel 1936 (Approved Lists 1980)
                         12 Genus "Methanofrustulum" Protasov and Brune 2023 nom. inval.