Length 16 mm.
1: 25% of animal-width occupied by narrow girdle, but in this lateral view, because of slope of shell and perspective, girdle appears to occupy about 30% of width.
2: slight apex/beak on each of valves ii –vii.
3: mucro on tail valve viii resembles slight apex/beak.
North Yorkshire. September 2014. (leg. Paula Lightfoot).