D Moniliformis Guide
Credit: Marina Potapova
  1. Smaller valves elliptic, with rounded ends
  2. Larger valves lanceolate, with subrostrate ends
  3. Valve width most often 3-5 µm
  4. Transapical ribs 6-11 in 10 µm

Valves are elliptic to elliptic-lanceolate, with rounded to subcapitate apices. Transapical ribs are clearly visible under LM. In contrast, striae are not visible under LM.