Tryblionella granulata guide1
  1. Valves elliptic to elliptic-lanceolate
  2. Apices rounded to slightly cuneate
  3. Fibulae equally spaced
  4. Striae coarse

Valves are elliptic to elliptic-lanceolate. Apices are rounded to slightly cuneate. Fibulae are equally spaced. Striae are very coarse.