Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Archaea Woese et al. 1990 [paraphyletic]
               Phylum Euryarchaeota Garrity and Holt 2001
                 Class Methanobacteria Boone 2002 [monotypic]
                   Order Methanobacterialesᵀ Balch and Wolfe 1981
                     Family Methanobacteriaceaeᵀ Barker 1956 (Approved Lists 1980)
                       Genus Methanobrevibacter Balch and Wolfe 1981
                         01 Methanobrevibacter acididurans Savant et al. 2002
                         02 Methanobrevibacter arboriphilus corrig. (Zeikus and Henning 1975) Balch and Wolfe 1981
                         03 Methanobrevibacter boviskoreani Lee et al. 2013
                         04 Methanobrevibacter curvatus Leadbetter and Breznak 1997
                         05 Methanobrevibacter cuticularis Leadbetter and Breznak 1997
                         06 Methanobrevibacter filiformis Leadbetter et al. 1998
                         07 Methanobrevibacter gottschalkii Miller and Lin 2002
                         08 Methanobrevibacter millerae Rea et al. 2007
                         09 Methanobrevibacter olleyae Rea et al. 2007
                         10 Methanobrevibacter oralis Ferrari et al. 1995
                         11 Methanobrevibacter ruminantiumᵀ (Smith and Hungate 1958) Balch and Wolfe 1981
                         12 Methanobrevibacter smithii Balch and Wolfe 1981
                         13 Methanobrevibacter thaueri Miller and Lin 2002
                         14 Methanobrevibacter woesei Miller and Lin 2002
                         15 Methanobrevibacter wolinii Miller and Lin 2002