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
                       1 Genus "Candidatus Argarchaeum" corrig. Chen et al. 2021
                       2 Genus "Candidatus Ethaniperedens" corrig. Hahn et al. 2022
                       3 Family "Candidatus Methanoperedentaceae" corrig. Haroon et al. 2020 [monotypic]
                       4 Family "Candidatus Methanocomedentaceae" corrig. Chadwick et al. 2022 nom. pro-inval.
                       5 Family "Candidatus Methanogastraceae" corrig. Chadwick et al. 2022 nom. pro-inval. [monotypic]
                       6 Family Methanosarcinaceaeᵀ Balch and Wolfe 1981
                       7 Family Methanotrichaceae Akinyemi et al. 2021
                       8 Family Methermicoccaceae Cheng et al. 2007 [monotypic]