 |
| Potamopyrgus antipodarum (J. E. Gray, 1843) |
| Keeled form from brackish water on the Bann Estuary, Co Londonderry |
[ Description ]
|
| Potamopyrgus antipodarum (J. E. Gray, 1843) |
| Keeled form from brackish water on the Bann Estuary, Co Londonderry |
[ Description ]