Procaryotic Genera Ref: G.M. Garrity et al., 2001b: 1; Count: [*] 25p;39c;84o;215f;1008g [28 May 2016] Domain "Archaea" Woese et al. 1990 Ref: G.M. Garrity et al., 2001b: 1; Count: [*] 2p;8c;12o;21f;73g [26 May 2016] Phylum Euryarchaeota Garrity and Holt 2001 Ref: G.M. Garrity et al., 2001b: 1 [new taxon]; Count: [*] 7c;9o;16f;50g [26 May 2016] Class Methanobacteria Boone 2001 nom. inval. [monotypic] see Class Methanobacteria Boone 2002 Ref: G.M. Garrity et al., 2001b: 1 [new taxon]; Count: [*] 1o;2f;5g [26 May 2016] Order Methanobacterialesᵀ Balch and Wolfe 1981 Ref: G.M. Garrity et al., 2001b: 1 [new position]; Count: [*] 2f;5g [26 May 2016] Family Methanobacteriaceae Barker 1956 (Approved Lists 1980) Ref: G.M. Garrity et al., 2001b: 1; Count: [*] 4g [26 May 2016] Genus Methanobacteriumᵀ Kluyver and van Niel 1936 (Approved Lists 1980) Ref: G.M. Garrity et al., 2001b: 1; Count: -