| anguilla | | contracaecum rudolphii a bullini et al., 1986 | species | 0 | 1 |
| italy | | contracaecum rudolphii a bullini et al., 1986 | species | 7 | 0 |
| italy | sardinia autonomous region | contracaecum rudolphii a bullini et al., 1986 | species | 1 | 2 |
| italy | veneto region | contracaecum rudolphii a bullini et al., 1986 | species | 15 | 0 |
| poland | | contracaecum rudolphii a bullini et al., 1986 | species | 1 | 0 |