| Citation | Harms, J., 1993 Check list of species (algae, invertebrates and vertebrates) found in the vicinity of the island of Helgoland (North Sea, German Bight) - a review of recent records. Helgoländer Meeresunters 47:1-34. |
| Ref. | 2711 Harms, J., 1993 |
| Page | 18 |
| Named Used as Valid | Retusa obtusa |
| Locality | |
| Distribution |