Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Clade neomura Cavalier-Smith, 1987 Domain Archaea Woese et al. 2024 [paraphyletic] Kingdom Methanobacteriati (Garrity and Holt 2023) Oren and Göker 2024 Phylum Methanobacteriotaᵀ Garrity and Holt 2023 Class Methanobacteriaᵀ 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