[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 "Methanomicrobia" Garrity et al. 2005 nom. inval.
         Order Methanosarcinales Boone et al. 2002
           Family Methanosarcinaceae Balch and Wolfe 1981
             Genus Methanosarcina Kluyver and van Niel 1936 (Approved Lists 1980)
               Methanosarcina barkeri Schnellen 1947 (Approved Lists 1980)