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Guide to Neidium hercynicum

Mayer 1917

Neidium hercynicum guide
  1. Valves narrow, elliptic
  2. Striae oblique
  3. Central area diagonally shaped
  4. Apices broadly rounded

The valves are narrow elliptic. Striae are oblique, forming an angle of 23° - 28° from the central sternum. Apices are broadly rounded. The central area is small and diagonal to diamond shaped. The proximal raphe ends deflected and short. The apices are broadly rounded.