Length 4.1 mm. Dorset, England. February 2018. Leg. S. Trewhella.
Anterior on right of frame.
In dorsal view, when extended, the width is about 50% of the length. The sides of the compound shell are almost parallel, forming an oblong with rounded ends, but the varying extension of the peripheral girdle affects the animal’s outline. In this case it is retracted at the head end, giving an apparent anterior taper to the outline.
The eight thin, fragile, whitish, slightly translucent valves have pinkish tint due to the red body showing through. Some of the valves are stained yellowish or light brown.