| brazil | bahia | uncultured candidatus cardinium sp. | species | 1 | 0 |
| brazil | sao paulo | uncultured candidatus cardinium sp. | species | 2 | 0 |
| canada | | uncultured candidatus cardinium sp. | species | 1 | 0 |
| chile | | uncultured candidatus cardinium sp. | species | 2 | 0 |
| china | | uncultured candidatus cardinium sp. | species | 2 | 0 |
| india | karnataka | uncultured candidatus cardinium sp. | species | 6 | 0 |
| india | rio grande do norte | uncultured candidatus cardinium sp. | species | 1 | 0 |
| iran | | uncultured candidatus cardinium sp. | species | 3 | 0 |
| israel | | uncultured candidatus cardinium sp. | species | 5 | 0 |
| italy | | uncultured candidatus cardinium sp. | species | 2 | 0 |
| japan | hokkaido prefecture | uncultured candidatus cardinium sp. | species | 73 | 0 |
| mexico | yucatan | uncultured candidatus cardinium sp. | species | 1 | 0 |
| pakistan | | uncultured candidatus cardinium sp. | species | 1 | 0 |
| russia | volgograd oblast | uncultured candidatus cardinium sp. | species | 3 | 0 |
| south africa | | uncultured candidatus cardinium sp. | species | 1 | 0 |
| turkmenistan | | uncultured candidatus cardinium sp. | species | 1 | 0 |
| united kingdom | england | uncultured candidatus cardinium sp. | species | 52 | 0 |