Neidium Pseudodensestriatum2 Guide
  1. Valves expanded, elliptic
  2. Proximal raphe ends with short hooks
  3. Central area transversely elliptic
  4. Longitudinal canals present

Valves are expanded and elliptic. The proximal raphe ends have short hooks, deflected in opposite directions. The central area is transversely elliptic. Longitudinal canals are present at the valve margin.