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. 2018 Dec 14;2(4):629–646. doi: 10.1042/ETLS20180031

Table 1. Methanogen orders and methanogenesis pathways.

Order Representative organism Methanogenesis pathways Comments
Methanopyrales Methanopyrus kandleri Hydrogenotrophic Deepest branching
Methanococcales Methanococcus maripaludis Hydrogenotrophic Genetic systems
Methanobacteriales Methanobacterium thermoautotrophicum Hydrogenotrophic
Methanosarcinales Methanosarcina mazei Hydrogenotrophic, methylotrophic, carboxydotrophic, acetoclastic Largest archaeal genome, genetic systems, closely related to ANME-2 methanotrophs
Methanomicrobiales Methanospirillum hungatei Hydrogenotrophic
Methanocellales Methanocella paludicola Hydrogenotrophic
Methanomassiliicoccales Methanomassiliicoccus luminyensis Methylotrophic Was ANME-1 methanotrophs
Halobacteriales Halobacterium salinarum None, aerobic halophilic heterotrophs Genetic systems
Thermoplasmatales Thermoplasma volcanium None, thermophilic heterotrophs
Archaeoglobales Archaeoglobus fulgidus None, anaerobic sulfate-reducers