| canada | british columbia | protoperidinium cf. depressum | species | 4 | 0 |
| canada | british columbia | protoperidinium fukuyoi | species | 2 | 0 |
| china | jiangsu | protoperidinium cf. conicum type a | species | 1 | 0 |
| china | jiangsu | protoperidinium humile | species | 2 | 0 |
| china | jiangsu | protoperidinium latissimum | species | 1 | 0 |
| china | liaoning | protoperidinium divaricatum | species | 1 | 0 |
| china | liaoning | protoperidinium pentagonum | species | 1 | 0 |
| china | shandong | protoperidinium americanum | species | 1 | 0 |
| china | shandong | protoperidinium biconicum | species | 1 | 0 |
| china | shandong | protoperidinium conicoides | species | 1 | 0 |
| china | shandong | protoperidinium humile | species | 2 | 0 |
| china | shandong | protoperidinium latissimum | species | 3 | 0 |
| china | shandong | protoperidinium leonis | species | 1 | 0 |
| china | shandong | protoperidinium parthenopes | species | 1 | 0 |
| china | shandong | protoperidinium punctulatum | species | 10 | 0 |
| china | shanghai shi | protoperidinium shanghaiense | species | 2 | 0 |
| china | tianjin shi | islandinium tricingulatum | species | 10 | 0 |
| ireland | | protoperidinium crassipes | species | 1 | 0 |
| ireland | | protoperidinium depressum | species | 1 | 0 |
| ireland | | protoperidinium divergens | species | 1 | 0 |
| ireland | | protoperidinium oblongum | species | 1 | 0 |
| ireland | | protoperidinium pellucidum | species | 1 | 0 |
| japan | hokkaido prefecture | protoperidinium abei | species | 2 | 0 |
| japan | hokkaido prefecture | protoperidinium conicum | species | 5 | 0 |
| japan | hokkaido prefecture | protoperidinium crassipes | species | 2 | 0 |
| japan | hokkaido prefecture | protoperidinium denticulatum | species | 2 | 0 |
| japan | hokkaido prefecture | protoperidinium divergens | species | 1 | 0 |
| japan | hokkaido prefecture | protoperidinium leonis | species | 5 | 0 |
| japan | hokkaido prefecture | protoperidinium pallidum | species | 3 | 0 |
| japan | hokkaido prefecture | protoperidinium pellucidum | species | 2 | 0 |
| japan | hokkaido prefecture | protoperidinium punctulatum | species | 3 | 0 |
| japan | hokkaido prefecture | protoperidinium thorianum | species | 2 | 0 |
| japan | nagasaki prefecture | protoperidinium crassipes | species | 1 | 0 |
| japan | nagasaki prefecture | protoperidinium pallidum | species | 1 | 0 |
| japan | nagasaki prefecture | protoperidinium punctulatum | species | 1 | 0 |
| japan | nagasaki prefecture | protoperidinium thulesense | species | 5 | 0 |
| japan | shizuoka prefecture | protoperidinium divergens | species | 1 | 0 |
| portugal | | protoperidinium minutum | species | 2 | 0 |
| united states | | protoperidinium lousianensis | species | 1 | 0 |
| united states | florida | protoperidinium crassipes | species | 1 | 0 |
| united states | florida | protoperidinium sp. m064-sm-1 | species | 25 | 0 |
| united states | massachusetts | protoperidinium conicoides | species | 1 | 0 |
| united states | massachusetts | protoperidinium steidingerae | species | 1 | 0 |