Large, 15mm diameter, uneroded, uncrowded specimen from near surface of non-tidal marine lake, salinity 31.9ppt, Dee Estuary, England. June 2011. Ridged wall plates. Low truncated cone with steep sides. Aperture rim crenate.
Large, 15mm diameter, uneroded, uncrowded specimen from near surface of non-tidal marine lake, salinity 31.9ppt, Dee Estuary, England. June 2011. Ridged wall plates. Low truncated cone with steep sides. Aperture rim crenate.