Diatoms of North AmericaDiatoms of North America
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Guide to Neidium hitchcockii

(Ehrenb.) Cleve 1894

Neidium Hitchcockii2 Guide
  1. Valve margins triundulate
  2. Conopeum-like structure
  3. Proximal raphe fissures are long and variable in deflection
  4. Longitudinal canals present at valve margins

Valves are linear-lanceolate and triundulate with apicuate apices. A distinctive conopeum-like structure borders the raphe. Longitudinal canals border the valve margins. Proximal raphe ends are long and deflect in opposite direction. The angle of deflection is variable, from 45° to 90°to recurved.