Diatoms of North AmericaDiatoms of North America
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Guide to Nitzschia sociabilis

Hust. 1957

Nitzschia Socialibis Guide
Credit: Kalina Manoylov, Paul Hamilton
  1. Apices nearly apiculate
  2. Fibulae distinct, irregularly spaced
  3. Frustules sigmoid (in girdle view)
  4. Longitudinal line appears to connect fibulae

Frustules are lightly silicified and sigmoid in girdle view. Valves are rhomboid-lanceolate and have sharp apices. Striae are not resolvable in LM. Fibulae are irregularly spaced. A gap between fibulae is absent in the central valve. A longitudinal line appears to connect fibulae.