12 Assiminea grayana

12 Assiminea grayana

Narrow  salting with A. grayana in damp short turf (1) and Phragmites reeds (2). Abrupt change from A. grayana on turf to Peringia ulvae on sand (3) with no intermingling. Potamopyrgus antipodarum in freshwater beyond dunes (4). Dee Estuary, England.