Domain Archaea Woese et al. 1990
Count: [*] *
   Phylum Euryarchaeota Garrity and Holt 2001
  Count: [*] *
     Class Methanococci Boone 2001 nom. inval. see Class Methanococci Boone 2002
    Count: [*] *
       Order Methanosarcinales Boone et al. 2001 nom. inval. see Order Methanosarcinales Boone et al. 2002
      Count: [*] *
         Family Methanosarcinaceae Balch and Wolfe 1981
        Count: -
           Genus Methanosarcina Kluyver and van Niel 1936 (Approved Lists 1980)
          Count: -