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. 1990 stat. inval. [paraphyletic]] see Domain Archaea Woese et al. 2024
               [Phylum "Euryarchaeota" Garrity and Holt 2002 stat. inval.] see Kingdom Methanobacteriati (Garrity and Holt 2023) Oren and Göker 2024
                 [Order "Candidatus Altiarchaeales" (sic) Probst et al. 2014 nom. pro-inval.] see Order Altarchaeales corrig. Probst et al. 2020
                 [Class "Candidatus Methanofastidiosa (WSA2 / Arc I)" (sic) Nobu et al. 2016 nom. pro-inval.] see Class Methanofastidiosia corrig. Nobu et al. 2020
                 1 Candidatus Aciduliprofundum boonei Schouten et al. 2008, incertae sedis
                 3.1.2.0 [Class "Methanomicrobia" Garrity et al. 2003 nom. ined.] see Class Methanomicrobia Garrity et al. 2005 nom. inval.
                 3.2.0 ["halophils"] see Class Halobacteria Grant et al. 2001 nom. inval.
                 n.0 ["methanogens"] see Phylum Euryarchaeota Garrity and Holt 2002 stat. inval.