| argentina | buenos aires province | maritrema prosthometra | species | 0 | 1 |
| ireland | northern ireland | maritrema oocysta | species | 2 | 0 |
| kuwait | | maritrema eroliae | species | 4 | 2 |
| kuwait | | maritrema neomi | species | 0 | 1 |
| new zealand | | maritrema deblocki | species | 2 | 0 |
| new zealand | | maritrema novaezealandense | species | 2 | 0 |
| new zealand | | maritrema poulini | species | 8 | 0 |
| new zealand | otago | maritrema novaezealandense | species | 1 | 1 |
| portugal | | maritrema portucalense | species | 1 | 0 |
| united kingdom | | maritrema arenaria | species | 1 | 0 |
| united kingdom | | maritrema oocysta | species | 1 | 0 |
| united states | | maritrema prosthometra | species | 1 | 0 |
| united states | texas | maritrema arenaria | species | 0 | 1 |