Table 2.
Taxonomy of methanogens.
| Order | Family | Genus | Number of Valid Published Species |
|---|---|---|---|
| Methanobacteriales | Methanobacteriaceae | Methanobacterium | 24 |
| Methanobrevibacter | 15 | ||
| Methanosphaera | 2 | ||
| Methanothermobacter | 8 | ||
| Methanothermaceae | Methanothermus | 2 | |
| Methanococcales | Methanocaldococcaceae | Methanocaldococcus | 7 |
| Methanotorris | 2 | ||
| Methanococcaceae | Methanococcus | 4 | |
| Methanothermococcus | 2 | ||
| Methanocellales | Methanocellaceae | Methanocella | 3 |
| Methanomicrobiales | Methanocalculaceae | Methanocalculus | 6 |
| Methanocorpusculaceae | Methanocorpusculum | 4 | |
| Methanomicrobiaceae | Methanoculleus | 11 | |
| Methanofollis | 5 | ||
| Methanogenium | 4 | ||
| Methanolacinia | 2 | ||
| Methanomicrobium | 1 | ||
| Methanoplanus | 2 | ||
| Methanoregulaceae | Methanolinea | 2 | |
| Methanoregula | 2 | ||
| Methanosphaerula | 1 | ||
| Methanospirillaceae | Methanospirillum | 4 | |
| Methanosarcinales | Methanosarcinaceae | Halomethanococcus | 1 |
| Methanimicrococcus | 1 | ||
| Methanococcoides | 4 | ||
| Methanohalobium | 1 | ||
| Methanohalophilus | 4 | ||
| Methanolobus | 7 | ||
| Methanomethylovorans | 3 | ||
| Methanosalum | 2 | ||
| Methanosarcina | 13 | ||
| Methanotrichaceae | Methanothrix | 2 | |
| Methermicoccaceae | Methermicoccus | 1 | |
| Methanopyrales | Methanopyraceae | Methanopyrus | 1 |
| Methanomassiliicoccales | Methanomassiliicoccaceae | Methanomassiliicoccus | 3 |