| brazil | | uncultured methanobacterium sp. | species | 2 | 0 |
| china | | uncultured methanobacterium sp. | species | 89 | 0 |
| china | guangdong | uncultured methanobacterium sp. | species | 2 | 0 |
| china | hunan | uncultured methanobacterium sp. | species | 5 | 0 |
| colombia | | uncultured methanobacterium sp. | species | 1 | 0 |
| costa rica | | uncultured methanobacterium sp. | species | 1 | 0 |
| czech republic | | uncultured methanobacterium sp. | species | 2 | 0 |
| france | | methanobacterium sp. enrichment culture clone a1er16 | species | 1 | 0 |
| france | | methanobacterium sp. enrichment culture clone e4er19 | species | 1 | 0 |
| germany | | uncultured methanobacterium sp. | species | 1 | 0 |
| germany | hesse | uncultured methanobacterium sp. | species | 2 | 0 |
| greece | central macedonia region | uncultured methanobacterium sp. | species | 1 | 0 |
| india | | uncultured methanobacterium sp. | species | 91 | 0 |
| japan | | uncultured methanobacterium sp. | species | 30 | 0 |
| japan | hokkaido prefecture | uncultured methanobacterium sp. | species | 4 | 0 |
| japan | iwate prefecture | uncultured methanobacterium sp. | species | 1 | 0 |
| japan | kumamoto prefecture | uncultured methanobacterium sp. | species | 3 | 0 |
| mexico | | uncultured methanobacterium sp. | species | 7 | 0 |
| netherlands | | uncultured methanobacterium sp. | species | 1 | 0 |
| nigeria | | uncultured methanobacterium sp. | species | 4 | 0 |
| philippines | | uncultured methanobacterium sp. | species | 2 | 0 |
| russia | | uncultured methanobacterium sp. | species | 7 | 0 |
| slovakia | | uncultured methanobacterium sp. | species | 3 | 0 |
| south korea | seoul city | uncultured methanobacterium sp. | species | 6 | 0 |
| spain | madrid | uncultured methanobacterium sp. | species | 1 | 0 |
| sweden | ostergoetland | uncultured methanobacterium sp. | species | 1 | 0 |
| tanzania | | uncultured methanobacterium sp. | species | 1 | 0 |
| thailand | | uncultured methanobacterium sp. | species | 37 | 0 |
| turkey | | uncultured methanobacterium sp. | species | 3 | 0 |
| united states | alaska | uncultured methanobacterium sp. | species | 10 | 0 |