| japan | fukuoka prefecture | chaetoceros salsugineum dna virus | species | 2 | 0 |
| japan | fukuoka prefecture | chaetoceros tenuissimus dna virus | species | 2 | 0 |
| japan | hiroshima prefecture | chaetoceros sp. dna virus 7 | species | 2 | 0 |
| united states | | bacilladnavirus sp. | species | 1 | 0 |