| australia | | didymozoid sp. 1-po-2003 | species | 2 | 0 |
| australia | | didymozoid sp. 2-po-2003 | species | 2 | 0 |
| australia | | didymozoid sp. 3-po-2003 | species | 2 | 0 |
| australia | queensland | helicodidymozoon tortor | species | 10 | 0 |
| australia | western australia | helicodidymozoon tortor | species | 2 | 0 |
| brazil | | allonematobothrioides scombri | species | 1 | 0 |
| brazil | | nematobothrium scombri | species | 5 | 0 |
| brazil | amazonas | brasicystis bennetti | species | 0 | 1 |
| brazil | rio de janeiro | didymocystis wedli | species | 0 | 1 |
| croatia | | didymosulcus katsuwonicola | species | 56 | 0 |
| japan | nagasaki prefecture | didymocystis wedli | species | 3 | 0 |
| japan | nagasaki prefecture | didymozoidae sp. dp-280 | species | 4 | 0 |
| japan | nagasaki prefecture | didymozoidae sp. nagasaki-001-2007 | species | 2 | 0 |
| japan | nagasaki prefecture | didymozoidae sp. pc-298 | species | 4 | 0 |
| japan | nagasaki prefecture | koellikeria globosa | species | 2 | 0 |
| japan | nagasaki prefecture | koellikerioides apicalis | species | 3 | 0 |
| japan | shimane prefecture | didymozoidae sp. ch-334 | species | 4 | 0 |
| japan | shimane prefecture | didymozoidae sp. pc-333 | species | 4 | 0 |
| japan | shimane prefecture | didymozoidae sp. pm-339 | species | 5 | 0 |
| japan | wakayama prefecture | didymozoidae sp. pm-332 | species | 4 | 0 |
| spain | | didymozoidae sp. sp-2005 | species | 1 | 0 |
| united kingdom | | didymozoon scombri | species | 1 | 0 |
| united states | alabama | didymocystis scomberomori | species | 1 | 1 |
| united states | alabama | didymocystis sp. ex scomberomorus maculatus mja-2016 | species | 1 | 0 |
| united states | florida | didymocystis scomberomori | species | 0 | 1 |
| united states | louisiana | didymocystis scomberomori | species | 0 | 1 |
| united states | mississippi | didymocystis scomberomori | species | 0 | 1 |