| Name | Class | Order | Family | Genus |
|---|---|---|---|---|
| Methanococcoides alaskense | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanococcoides |
| Methanococcoides burtonii | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanococcoides |
| Methanococcoides methylutens | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanococcoides |
| Methanococcoides vulcani | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanococcoides |
| 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 |
| 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 |
| Methanomicrococcus blatticola | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanimicrococcus |
| 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 |
| Methermicoccus shengliensis | Methanomicrobia | Methanosarcinales | Methermicoccaceae | Methermicoccus |
| Methanosarcina flavescens | Methanomicrobia | Methanosarcinales | Methanosarcinaceae | Methanosarcina |