life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Archaea Woese et al. 1990
     1 Candidate phylum Micrarchaeota Baker and Dick 2013
     2.1 Candidate phylum Diapherotrites Rinke et al. 2013
     2.2.1 [Superphylum] DPANN Rinke et al. 2013
     2.2.2.1 Candidate order Altiarchaeales Probst et al. 2014
     2.2.2.2.1 Candidate phylum Z7ME43
     2.2.2.2.2.1.1.1 Class Methanopyri Garrity and Holt 2002
     2.2.2.2.2.1.1.2 Class Methanococci Boone 2002
     2.2.2.2.2.1.1.3 Class Hadesarchaea (SAGMEG) Baker et al. 2016
     2.2.2.2.2.1.1.4 Class Thermococci Zillig and Reysenbach 2002
     2.2.2.2.2.1.1.5 Class Methanobacteria Boone 2002
     2.2.2.2.2.1.2.1 Class Thermoplasmata Reysenbach 2002
     2.2.2.2.2.1.2.2.1 Class Archaeoglobi Garrity and Holt 2002
     2.2.2.2.2.1.2.2.2.1 Class Methanomicrobia
     2.2.2.2.2.1.2.2.2.2 Class Halobacteria Grant et al. 2002
     2.2.2.2.2.2 Superphylum TACK Guy and Ettema 2011