| antarctica | | myrionecta rubra | species | 2 | 0 |
| argentina | chubut province | uncultured myrionecta | species | 4 | 0 |
| china | | askenasia sp. fg-2015 | species | 1 | 0 |
| china | | askenasia sp. lww2010032604 | species | 3 | 0 |
| china | | mesodinium acarus | species | 1 | 0 |
| china | guangdong | mesodinium pulex | species | 1 | 0 |
| denmark | | mesodinium major | species | 1 | 0 |
| luxembourg | | uncultured askenasia | species | 4 | 0 |
| mexico | yucatan | mesodinium rubrum | species | 0 | 1 |
| namibia | | mesodinium major | species | 1 | 0 |
| south korea | | uncultured mesodinium sp. | species | 3 | 0 |
| spain | | myrionecta rubra | species | 4 | 0 |
| spain | andalusia | mesodinium rubrum | species | 1 | 0 |
| united states | | uncultured mesodinium sp. | species | 489 | 0 |
| united states | alaska | uncultured mesodinium sp. | species | 91 | 0 |
| united states | maryland | mesodinium pulex | species | 1 | 0 |
| united states | maryland | myrionecta rubra | species | 1 | 0 |