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 Methanopyri Garrity and Holt 2002 [monotypic]
                   Order Methanopyralesᵀ Huber and Stetter 2002 [monotypic]
                     Family Methanopyraceaeᵀ Huber and Stetter 2002 [monotypic]
                       Genus Methanopyrusᵀ Kurr et al. 1992 [monotypic]
                         1 Methanopyrus kandleriᵀ Kurr et al. 1992