Neidium Bobmarshallensis Guide
Credit: Loren Bahls
  1. Valves lanceolate
  2. Central area diagonal
  3. Striae diagonal

Neidium bobmarshallensis has lanceolate valves, 14-18 µm wide. The central area is diagonal. Striae are also diagonal and number 13-15 in 10 µm. The proximal raphe ends are hooked in opposite directions.