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 Thermoplasmata Reysenbach 2002
                     Order Thermoplasmatalesᵀ Reysenbach 2002
                       1 Genus "Candidatus Scheffleriplasma" Krause et al. 2022 nom. pro-inval.
                       2 Genus Thermogymnomonas Itoh et al. 2007 [monotypic]
                       3 Family Cuniculiplasmataceae Golyshina et al. 2016 [monotypic]
                       4 Family Ferroplasmataceae corrig. Golyshina et al. 2000
                       5 Family Picrophilaceae Schleper et al. 1996 [monotypic]
                       6 Family Thermoplasmataceaeᵀ Reysenbach 2002