| germany | | otostrongylus circumlitus | species | 2 | 0 |
| germany | lower saxony | otostrongylus circumlitus | species | 0 | 1 |
| germany | saxony | otostrongylus circumlitus | species | 0 | 1 |
| united states | california | otostrongylus circumlitus | species | 3 | 2 |
| united states | oregon | otostrongylus circumlitus | species | 0 | 1 |