| Name | Class | Order | Family | Genus |
|---|---|---|---|---|
| Methanocalculus chunghsingensis | Methanomicrobia | Methanomicrobiales | Methanocalculaceae | Methanocalculus |
| Methanocalculus halotolerans | Methanomicrobia | Methanomicrobiales | Methanocalculaceae | Methanocalculus |
| Methanocalculus natronophilus | Methanomicrobia | Methanomicrobiales | Methanocalculaceae | Methanocalculus |
| Methanocalculus pumilus | Methanomicrobia | Methanomicrobiales | Methanocalculaceae | Methanocalculus |
| Methanocalculus taiwanensis | Methanomicrobia | Methanomicrobiales | Methanocalculaceae | Methanocalculus |
| Methanocella arvoryzae | Methanomicrobia | Methanocellales | Methanocellaceae | Methanocella |
| Methanocella conradii | Methanomicrobia | Methanocellales | Methanocellaceae | Methanocella |
| Methanocella paludicola | Methanomicrobia | Methanocellales | Methanocellaceae | Methanocella |
| Methanococcoides alaskense | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanococcoides |
| Methanococcoides burtonii | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanococcoides |
| Methanococcoides methylutens | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanococcoides |
| Methanococcoides vulcani | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanococcoides |
| Methanocorpusculum aggregans | Methanomicrobia | Methanomicrobiales | Methanocorpusculaceae | Methanocorpusculum |
| Methanocorpusculum bavaricum | Methanomicrobia | Methanomicrobiales | Methanocorpusculaceae | Methanocorpusculum |
| Methanocorpusculum labreanum | Methanomicrobia | Methanomicrobiales | Methanocorpusculaceae | Methanocorpusculum |
| Methanocorpusculum parvum | Methanomicrobia | Methanomicrobiales | Methanocorpusculaceae | Methanocorpusculum |
| Methanocorpusculum sinense | Methanomicrobia | Methanomicrobiales | Methanocorpusculaceae | Methanocorpusculum |
| Methanoculleus bourgensis | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus chikugoensis | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus horonobensis | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus hydrogenitrophicus | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus marisnigri | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus palmolei | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus receptaculi | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus sediminis | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus submarinus | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus thermophilus | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanofollis aquaemaris | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanofollis |
| Methanofollis ethanolicus | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanofollis |
| Methanofollis formosanus | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanofollis |
| Methanofollis liminatans | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanofollis |
| Methanofollis tationis | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanofollis |
| Methanogenium boonei | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanogenium |
| Methanogenium cariaci | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanogenium |
| Methanogenium frigidum | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanogenium |
| Methanogenium marinum | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanogenium |
| Methanogenium organophilum | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanogenium |
| Methanohalobium evestigatum | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanohalobium |
| Methanohalophilus euhalobius | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanohalophilus |
| Methanohalophilus halophilus | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanohalophilus |
| Methanohalophilus levihalophilus | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanohalophilus |
| Methanohalophilus mahii | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanohalophilus |
| Methanohalophilus portucalensis | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanohalophilus |
| Methanolacinia paynteri | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanolacinia |
| Methanolinea mesophila | Methanomicrobia | Methanomicrobiales | Methanoregulaceae | Methanolinea |
| Methanolinea tarda | Methanomicrobia | Methanomicrobiales | Methanoregulaceae | Methanolinea |
| Methanolobus bombayensis | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanolobus |
| Methanolobus oregonensis | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanolobus |
| Methanolobus profundi | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanolobus |
| Methanolobus psychrophilus | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanolobus |
| Methanolobus taylorii | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanolobus |
| Methanolobus tindarius | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanolobus |
| Methanolobus vulcani | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanolobus |
| Methanolobus zinderi | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanolobus |
| Methanomethylovorans hollandica | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanomethylovorans |
| Methanomethylovorans thermophila | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanomethylovorans |
| Methanomethylovorans uponensis | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanomethylovorans |
| Methanomicrobium mobile | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanomicrobium |
| Methanomicrococcus blatticola | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanimicrococcus |
| Methanoplanus endosymbiosus | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoplanus |
| Methanoplanus limicola | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoplanus |
| Methanoplanus petrolearius | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanolacinia |
| Methanoregula boonei | Methanomicrobia | Methanomicrobiales | Methanoregulaceae | Methanoregula |
| Methanoregula formicica | Methanomicrobia | Methanomicrobiales | Methanoregulaceae | Methanoregula |
| Methanosaeta concilii | Methanomicrobia | Methanosarcinales | Methanosaetaceae | Methanosaeta |
| Methanosaeta harundinacea | Methanomicrobia | Methanosarcinales | Methanosaetaceae | Methanosaeta |
| Methanosaeta pelagica | Methanomicrobia | Methanosarcinales | Methanosaetaceae | Methanosaeta |
| Methanosaeta thermophila | Methanomicrobia | Methanosarcinales | Methanosaetaceae | Methanosaeta |
| Methanosalsum zhilinae | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosalsum |
| Methanosarcina acetivorans | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |
| Methanosarcina baltica | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |
| Methanosarcina barkeri | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |
| Methanosarcina horonobensis | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |
| Methanosarcina lacustris | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |
| Methanosarcina mazei | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |
| Methanosarcina semesiae | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |
| Methanosarcina siciliae | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |
| Methanosarcina soligelidi | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |
| Methanosarcina spelaei | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |
| Methanosarcina thermophila | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |
| Methanosarcina vacuolata | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |
| Methanosphaerula palustris | Methanomicrobia | Methanomicrobiales | Methanoregulaceae | Methanosphaerula |
| Methanospirillum hungatei | Methanomicrobia | Methanomicrobiales | Methanospirillaceae | Methanospirillum |
| Methanospirillum lacunae | Methanomicrobia | Methanomicrobiales | Methanospirillaceae | Methanospirillum |
| Methanospirillum psychrodurum | Methanomicrobia | Methanomicrobiales | Methanospirillaceae | Methanospirillum |
| Methanospirillum stamsii | Methanomicrobia | Methanomicrobiales | Methanospirillaceae | Methanospirillum |
| Methermicoccus shengliensis | Methanomicrobia | Methanosarcinales | Methermicoccaceae | Methermicoccus |
| Methanosarcina flavescens | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |