| argentina | jujuy province | uncultured methanobrevibacter sp. | species | 1 | 0 |
| australia | western australia | uncultured methanobrevibacter sp. | species | 38 | 0 |
| brazil | | uncultured methanobrevibacter sp. | species | 23 | 0 |
| cameroon | | uncultured methanobrevibacter sp. | species | 12 | 0 |
| china | | uncultured methanobrevibacter sp. | species | 64 | 0 |
| china | hunan | uncultured methanobrevibacter sp. | species | 4 | 0 |
| czech republic | | uncultured methanobrevibacter sp. | species | 2 | 0 |
| france | | uncultured methanobrevibacter sp. | species | 2 | 0 |
| france | provence-alpes-cote d'azur region | uncultured methanobrevibacter sp. | species | 4 | 0 |
| germany | | uncultured methanobrevibacter sp. | species | 4 | 0 |
| germany | saxony-anhalt | uncultured methanobrevibacter sp. | species | 1 | 0 |
| hungary | | uncultured methanobrevibacter sp. | species | 2 | 0 |
| india | | uncultured methanobrevibacter sp. | species | 33 | 0 |
| indonesia | | uncultured methanobrevibacter sp. | species | 1 | 0 |
| italy | | uncultured methanobrevibacter sp. | species | 15 | 0 |
| japan | | uncultured methanobrevibacter sp. | species | 17 | 0 |
| japan | hokkaido prefecture | uncultured methanobrevibacter sp. | species | 18 | 0 |
| nigeria | | uncultured methanobrevibacter sp. | species | 30 | 0 |
| south africa | | uncultured methanobrevibacter sp. | species | 1 | 0 |
| spain | | uncultured methanobrevibacter sp. | species | 5 | 0 |
| tanzania | | uncultured methanobrevibacter sp. | species | 9 | 0 |
| thailand | | uncultured methanobrevibacter sp. | species | 1 | 0 |