Campylodiscus Hibernicus Guide
Credit: Sylvia Lee and Steve Main
  1. Valves saddle-shaped
  2. Canal raphe raised on a keel
  3. Radial ridges present

Cells are solitary, with saddle-shaped valves. Frustules are large. The valves are curved in the apical and transapical planes. The raphe is positioned at the valve margin, within a raised keel.