| bahamas | | uncultured nannocystaceae bacterium | species | 4 | 0 |
| china | | nannocystis sp. | species | 3 | 0 |
| china | | uncultured nannocystaceae bacterium | species | 2 | 0 |
| china | | uncultured nannocystis sp. | species | 1 | 0 |
| china | | uncultured plesiocystis sp. | species | 4 | 0 |
| china | hubei | nannocystis sp. mb1016 | species | 1 | 0 |
| china | hunan | uncultured nannocystis sp. | species | 8 | 0 |
| china | hunan | uncultured plesiocystis sp. | species | 6 | 0 |
| china | xinjiang | nannocystis pusilla | species | 1 | 0 |
| china | xinjiang | nannocystis sp. xj42 | species | 1 | 0 |
| denmark | region of southern denmark | nannocystis sp. | species | 3 | 0 |
| france | alsace region | nannocystis exedens | species | 1 | 0 |
| germany | lower saxony | uncultured nannocystis sp. | species | 1 | 0 |
| india | | nannocystis exedens | species | 1 | 0 |
| india | | uncultured nannocystis sp. | species | 1 | 0 |
| india | rajasthan | nannocystis sp. | species | 1 | 0 |
| india | sikkim | nannocystis exedens | species | 1 | 0 |
| indonesia | | nannocystis pusilla | species | 3 | 0 |
| iran | | nannocystis sp. | species | 4 | 0 |
| iran | hamadan province | nannocystis pusilla | species | 1 | 0 |
| iran | lorestan province | nannocystis pusilla | species | 1 | 0 |
| iran | mazandaran province | nannocystis exedens | species | 1 | 0 |
| iran | mazandaran province | nannocystis pusilla | species | 4 | 0 |
| iran | semnan province | nannocystis exedens | species | 1 | 0 |
| italy | | uncultured nannocystis sp. | species | 1 | 0 |
| italy | | uncultured plesiocystis sp. | species | 8 | 0 |
| japan | | plesiocystis sp. sis-2 | species | 1 | 0 |
| japan | | uncultured nannocystaceae bacterium | species | 1 | 0 |
| mexico | | uncultured nannocystis sp. | species | 8 | 0 |
| nigeria | | uncultured nannocystis sp. | species | 2 | 0 |
| spain | balearic islands | nannocystis pusilla | species | 1 | 0 |
| united states | | nannocystis exedens | species | 9 | 0 |
| united states | california | nannocystis pusilla | species | 3 | 0 |
| united states | utah | uncultured nannocystis sp. | species | 2 | 0 |
| vietnam | | nannocystis sp. | species | 5 | 0 |