| american samoa | | uncultured zetaproteobacteria bacterium | species | 2 | 0 |
| india | | uncultured zetaproteobacteria bacterium | species | 2 | 0 |
| israel | | uncultured zetaproteobacteria bacterium | species | 2 | 0 |
| italy | sicily autonomous region | uncultured zetaproteobacteria bacterium | species | 5 | 0 |
| united states | | zeta proteobacterium enrichment culture | species | 5 | 0 |
| united states | hawaii | uncultured zetaproteobacteria bacterium | species | 213 | 0 |