Gomphoneis Olivacea Guide
Credit: Pat Kociolek
  1. Valves clavate
  2. Individual areolae not discernible
  3. Central area rectangular, bordered by shortened striae

Valves are clavate, with a broadly rounded headpole and narrow footpole. The central area is bordered by shortened striae at, or near, the valve margin. Stigmoids are absent. Striae are costate and individual areolae within a stria are not discernible. Striae are radiate.