| antarctica | | alexandrium tamarense species complex group iv | species | 19 | 0 |
| australia | victoria | alexandrium tamarense species complex group iv | species | 6 | 0 |
| china | guangdong | alexandrium tamarense species complex group iv | species | 16 | 0 |
| china | guangxi | alexandrium tamarense species complex group iv | species | 17 | 0 |
| china | sichuan | alexandrium tamarense species complex group iv | species | 6043 | 0 |
| hong kong | | alexandrium tamarense species complex group iv | species | 24 | 0 |
| singapore | | alexandrium tamarense species complex group iv | species | 3 | 0 |