Shell height 5 mm. Flesh yellowish grey, marked black and yellow. Female; no penis behind head. Black opercular lobe (1) protruding beyond anterior of brown translucent operculum (2) Single blackish pallial tentacle (3) extended from corner of aperture onto operculum.
From large muddy salting pool on upper Dee Estuary, Flintshire, salinity 29 ‰ (variable). August. 2011.