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Guide to Geissleria acceptata

(Hust.) Lange-Bert. and Metzeltin 1996

G Acceptata Guide
Credit: Marina Potapova
  1. Valve margin elliptic
  2. Striae radiate
  3. Annulae present, each composed of two pairs of striae
  4. Stigma may be present or absent

Valves are elliptic and small. Striae are radiate. Annulae, each composed of two pairs of striae, are present at the poles but may be difficult to discern. The presence of a stigma in the central area is a variable character within the species.