Eunotia Cataractarum Guide
Credit: Paula Furey
  1. Ventral margin concave
  2. Dorsal margin slightly convex
  3. Apices capitate
  4. Striae parallel to slightly radiate
  5. One apical rimoportula

Valves with a concave ventral margin. The dorsal margin is slightly convex and set off dorsally by a steep sloping shoulder. Apices are capitate and rounded. Striae are parallel to slightly radiate. One apical rimoportula at the center of the apex (visible in SEM), with a distinct external pore. .