Adlafia Suchlandtii2 Guide
  1. Valves linear-lanceolate
  2. Apices nearly cuneate
  3. Striae radiate at center
  4. Striae abruptly convergent at apices

Valves are linear-lanceolate, with nearly cuneate ends. The striae are radiate at the center valve, becoming abruptly convergent near the ends.