Disarticulated valves, dorsal view. Length when live 3.5 mm. Intermediate valves (ii to vii) lack lateral insertion plates/slits and obvious openings to aesthete canals. Each has two widely separated, small, triangular, translucent, white apophyses (1) on its anterior edge that extend under the next valve forwards.
When an intermediate valve is viewed from the posterior, it has a low, smooth, curved profile with a very slight keel (2).
Dorset, England. February 2018. Leg. S. Trewhella.