[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain "Archaea" Woese et al. 1990
     Phylum "Euryarchaeota" Garrity and Holt 2001
       1 Class Methanobacteria Boone 2002
       2 Class Methanococci Boone 2002
       3 Class "Methanomicrobia"
       4 Class Halobacteria Grant et al. 2002
       5 Class Thermoplasmata Reysenbach 2002
       6 Class Thermococci Zillig and Reysenbach 2002
       7 Class Archaeoglobi Garrity and Holt 2002
       8 Class Methanopyri Garrity and Holt 2002