| algeria | | patella ferruginea | species | 1 | 0 |
| france | bretagne region | patella vulgata | species | 2 | 0 |
| italy | apulia region | patella caerulea | species | 0 | 1 |
| italy | sicily autonomous region | patella caerulea | species | 0 | 3 |
| portugal | | patella depressa | species | 2 | 0 |
| portugal | acores autonomous region | patella candei | species | 10 | 0 |
| portugal | viana do castelo district | patella pellucida | species | 1 | 0 |
| portugal | viana do castelo district | patella ulyssiponensis | species | 3 | 0 |
| portugal | viana do castelo district | patella vulgata | species | 6 | 0 |
| spain | | patella aspera | species | 4 | 0 |
| spain | | patella depressa | species | 6 | 0 |
| spain | | patella rustica | species | 1 | 0 |
| spain | | patella ulyssiponensis | species | 2 | 0 |
| spain | | patella vulgata | species | 19 | 0 |
| spain | andalusia | patella caerulea | species | 1 | 0 |
| spain | andalusia | patella ferruginea | species | 7 | 0 |
| spain | asturias | patella aspera | species | 19 | 0 |
| spain | asturias | patella rustica | species | 122 | 0 |
| spain | asturias | patella vulgata | species | 4 | 0 |
| spain | cantabria | patella vulgata | species | 1 | 0 |
| spain | catalonia | patella vulgata | species | 1 | 0 |
| spain | ceuta | patella caerulea | species | 5 | 0 |
| spain | ceuta | patella ferruginea | species | 13 | 0 |
| spain | ceuta | patella rustica | species | 3 | 0 |
| spain | melilla | patella caerulea | species | 2 | 0 |
| spain | melilla | patella ferruginea | species | 36 | 0 |
| tunisia | | patella ferruginea | species | 9 | 0 |
| united kingdom | | patella vulgata | species | 3 | 0 |
| united kingdom | england | patella vulgata | species | 0 | 1 |