Methanogenium frigidum Franzmann et al. 1997 Universal Root Woese et al. 1990 Archaea Woese et al. 1990 Euryarchaeota (sic) Garrity and Holt 2001 Methanobacteriota corrig. Garrity and Holt 2001 Methanococci Boone 2002 Methanomicrobiales Balch and Wolfe 1981 Methanomicrobiaceae Balch and Wolfe 1981 Methanogenium Romesser et al. 1981 emend. Spring et al. 2005 Methanogenium frigidum Franzmann et al. 1997 Methanogenium Romesser et al. 1981 emend. Spring et al. 2005 Methanogenium aggregans Ollivier et al. 1985 Methanogenium marisnigri Romesser et al. 1981 Methanogenium tationis Zabel et al. 1986 Methanogenium bourgense Ollivier et al. 1986 Methanogenium thermophilicum Rivard and Smith 1982 emend. Zabel et al. 1985 Methanogenium liminatans Zellner et al. 1990 Methanogenium organophilum Widdel et al. 1989 Methanogenicum olentangyi (sic) Corder et al. 1988 Methanogenium olentangyi corrig. Corder et al. 1988 Methanogenium frittonii Harris et al. 1996 Methanogenium marinum Chong et al. 2003 Methanogenium cariaci Romesser et al. 1981 emend. Maestrojuán et al. 1990 Methanogenium frigidum Franzmann et al. 1997 Franzmann P.D. Liu Y. Balkwill D.L. Aldrich H.C. Conway de Macario E. Boone D.R. Methanogenium frigidum sp. nov., a psychrophilic, H2-using methanogen from Ace Lake, Antarctica. 1997 47 4 1068 1072 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-47-4-1068 9336907 Liolios K. Chen I.M. Mavromatis K. Tavernarakis N. Hugenholtz P. Markowitz V.M. Kyrpides N.C. The Genomes On Line Database (GOLD) in 2009: status of genomic and metagenomic projects and their associated metadata 2010 38 D346 354 Nucleic Acids Research Nucleic Acids Res. 0305-1048 1362-4962 10.1093/nar/gkp848 19914934 Franzmann P.D. Liu Y. Balkwill D.L. Aldrich H.C. Conway de Macario E. Boone D.R. Methanogenium frigidum sp. nov., a psychrophilic, H2-using methanogen from Ace Lake, Antarctica. 1997 47 4 1068 1072 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-47-4-1068 9336907