Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Archaea Woese et al. 1990 [paraphyletic]
               Phylum Euryarchaeota Garrity and Holt 2001
                 Class "Methanomicrobia"
                   Order Methanosarcinales Boone et al. 2002
                     Family Methanosaetaceae Boone et al. 2002 nom. illeg. [monotypic]
                       [Genus Methanosaetaᵀ Patel and Sprott 1990 nom. illeg.] see Genus Methanothrix Huser et al. 1983
                         1 [Methanosaeta conciliiᵀ (Patel 1985) Patel and Sprott 1990] see Methanothrix soehngenii Huser et al. 1983
                         2 Methanosaeta harundinacea Ma et al. 2006
                         3 [Methanosaeta thermoacetophila (Nozhevnikova and Chudina 1988) Patel and Sprott 1990] see Methanothrix thermoacetophila corrig. Nozhevnikova and Chudina 1988
                         3.0 [Methanosaeta thermophila (Kamagata et al. 1992) Boone and Kamagata 1998] see Methanothrix thermoacetophila corrig. Nozhevnikova and Chudina 1988
                         3.0 ["Methanosaeta thermophila" (Kamagata et al., 1992) Boone & Kamagata, 1998] see Methanosaeta thermophila (Kamagata et al. 1992) Boone and Kamagata 1998