Rhoicoshenia Stoermeria Guide
Credit: Evan Thomas
  1. Apices acute
  2. Proximal raphe ends broadly spaced
  3. Central area panduriform

Valves are linear to narrowly clavate, with acute apices. The proximal raphe ends are broadly spaced from one another and positioned within a panduriform central area. Valves range from 80 to 25 µm in length and 6-9 µm in width. Areolae are distinctly lineate and number 11–13 in 10 μm.