| austria | | heligmosomoides polygyrus polygyrus | subspecies | 1 | 0 |
| czech republic | | heligmosomoides polygyrus polygyrus | subspecies | 2 | 0 |
| denmark | region of southern denmark | heligmosomoides polygyrus polygyrus | subspecies | 13 | 0 |
| france | | heligmosomoides polygyrus polygyrus | subspecies | 1 | 0 |
| greece | | heligmosomoides polygyrus polygyrus | subspecies | 3 | 0 |
| greece | crete region | heligmosomoides polygyrus polygyrus | subspecies | 2 | 0 |
| greece | thessaly region | heligmosomoides polygyrus polygyrus | subspecies | 2 | 0 |
| ireland | leinster province | heligmosomoides polygyrus polygyrus | subspecies | 2137 | 0 |
| ireland | northern ireland | heligmosomoides polygyrus polygyrus | subspecies | 82 | 0 |
| italy | | heligmosomoides polygyrus polygyrus | subspecies | 5 | 0 |
| italy | calabria region | heligmosomoides polygyrus polygyrus | subspecies | 2 | 0 |
| italy | liguria region | heligmosomoides polygyrus polygyrus | subspecies | 17 | 0 |
| morocco | | heligmosomoides polygyrus polygyrus | subspecies | 4 | 0 |
| poland | | heligmosomoides polygyrus polygyrus | subspecies | 1 | 0 |
| portugal | | heligmosomoides polygyrus polygyrus | subspecies | 1 | 0 |
| portugal | porto district | heligmosomoides polygyrus polygyrus | subspecies | 2 | 0 |
| romania | | heligmosomoides polygyrus polygyrus | subspecies | 3 | 0 |
| romania | caras-severin county | heligmosomoides polygyrus polygyrus | subspecies | 2 | 0 |
| russia | | heligmosomoides polygyrus polygyrus | subspecies | 1 | 0 |
| slovakia | | heligmosomoides polygyrus polygyrus | subspecies | 11 | 0 |
| spain | | heligmosomoides polygyrus polygyrus | subspecies | 2 | 0 |
| spain | catalonia | heligmosomoides polygyrus polygyrus | subspecies | 3 | 0 |
| united kingdom | england | heligmosomoides polygyrus polygyrus | subspecies | 37 | 0 |
| united kingdom | northern ireland | heligmosomoides polygyrus polygyrus | subspecies | 11 | 0 |
| united kingdom | scotland | heligmosomoides polygyrus polygyrus | subspecies | 2 | 0 |
| united kingdom | wales | heligmosomoides polygyrus polygyrus | subspecies | 1 | 0 |