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 in 2-4 rows
  5. Stigma present, but difficult to see

Valves are elliptic-lanceolate, with capitate apices. Striae are weakly radiate. The central area is small. Annulae in 2-4 rows. A stigma is present, but is often difficult to resolve.