[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain "Archaea" Woese et al. 1990 stat. inval. 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
       Class Methanobacteria Boone 2002
         Order Methanobacteriales Balch and Wolfe 1981
           Family Methanothermaceae Stetter 1982
             Genus Methanothermus Stetter 1982
               Methanothermus sociabilis Stetter 1986