| Citation | Essink, K., 1986 Note on the distribution of the American jack knife clam Ensis directus (Conrad, 1843) in NW Europe (Bivalvia: Cultellidae). Basteria 50:33-34. |
| Ref. | 3126 Essink, K., 1986 |
| Page | |
| Named Used as Valid | Ensis directus |
| Locality | |
| Distribution | North America including Mexico. Central and Southern North Sea and Eastern English Channel. |