Eunotia Bilii Guide
Credit: Paula Furey
  1. Dorsal margin undulate
  2. Apices terminate bluntly
  3. Striae on dorsal margin short and irregular

The dorsal margin with 5 to 8 undulations. The ventral margin is straight or slightly concave. The ends are protracted but terminate bluntly, with a slight ventral curvature at the ends. Irregular, shortened striae are present on the dorsal margin near the center valve.