Diatoms of North AmericaDiatoms of North America
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Guide to Geissleria declivis

(Hust.) Lange-Bert. 1996

Geissleria declivis guide
  1. Apices capitate
  2. Striae weakly radiate
  3. Central area small
  4. Annulae consist of 2-4 pairs of striae
  5. Stigma present but difficult to see

Valves are elliptic-lanceolate with capitate apices. Striae are weakly radiate. Central area is small. Annulae consist of 2-4 pairs of striae. Stigma is present but is often difficult to resolve.