| australia | | gallionella sp. pn013 | species | 1 | 0 |
| australia | | uncultured gallionella sp. | species | 3 | 0 |
| canada | british columbia | gallionella sp. | species | 2 | 0 |
| canada | nunavut | gallionella sp. uba4121 | species | 1 | 0 |
| canada | nunavut | gallionella sp. uba4666 | species | 1 | 0 |
| canada | nunavut | gallionella sp. uba4737 | species | 1 | 0 |
| canada | nunavut | gallionella sp. uba5154 | species | 1 | 0 |
| canada | nunavut | gallionella sp. uba6045 | species | 1 | 0 |
| china | | uncultured gallionella sp. | species | 12 | 0 |
| china | beijing | gallionella | genus | 0 | 1 |
| china | guangdong | gallionella | genus | 0 | 1 |
| germany | | gallionella sp. ja52 | species | 1 | 0 |
| india | | uncultured gallionella sp. | species | 2 | 0 |
| japan | ishikawa prefecture | uncultured gallionella sp. | species | 1 | 0 |
| japan | shimane prefecture | uncultured gallionella sp. | species | 27 | 0 |
| netherlands | | gallionella sp. | species | 2 | 0 |
| netherlands | | uncultured gallionella sp. | species | 2 | 0 |
| new zealand | auckland | gallionella sp. | species | 1 | 0 |
| new zealand | canterbury | gallionella sp. | species | 1 | 0 |
| russia | irkutsk oblast | candidatus gallionella acididurans | species | 327 | 0 |
| russia | irkutsk oblast | uncultured gallionella sp. | species | 1 | 0 |
| russia | zabaykalsky krai | uncultured gallionella sp. | species | 2 | 0 |
| spain | | uncultured gallionella sp. | species | 1 | 0 |
| united kingdom | wales | gallionella | genus | 0 | 2 |
| united kingdom | wales | uncultured gallionella sp. | species | 1 | 0 |
| united states | alabama | gallionella | genus | 0 | 1 |
| united states | colorado | gallionella | genus | 0 | 1 |
| united states | kentucky | gallionella sp. | species | 2 | 0 |
| united states | massachusetts | uncultured gallionella sp. | species | 3 | 0 |
| united states | tennessee | gallionella sp. | species | 463 | 0 |
| united states | utah | gallionella sp. | species | 4 | 0 |
| vietnam | | uncultured gallionella sp. | species | 1 | 0 |