| china | | uncultured fibrobacter sp. | species | 3 | 0 |
| china | hunan | uncultured fibrobacter sp. | species | 2 | 0 |
| india | | uncultured fibrobacter sp. | species | 29 | 0 |
| nigeria | | uncultured fibrobacter sp. | species | 8 | 0 |
| spain | | uncultured fibrobacter sp. | species | 1 | 0 |
| united kingdom | england | uncultured fibrobacter sp. | species | 65 | 0 |
| united states | | uncultured fibrobacter sp. | species | 2 | 0 |