Diatoms of North AmericaDiatoms of North America
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Compare Geissleria cascadensis

(Sovereign) Stancheva and S.A.Spauld. 2019

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Geissleria acceptata is smaller and has fine areolae that are not visible under LM.

Other species of Geissleria have areolae that are less coarse.

LM scalebar = 10 µm
Navicula cascadensis LM1 Navicula cascadensis LM2 Navicula cascadensis LM3 Navicula cascadensis LM4 Navicula cascadensis LM5 Navicula cascadensis LM6 Navicula cascadensis LM7
Length Range
10-23 µm
Width Range
6.0-9.6 µm
Striae in 10 µm
10-12 at the valve center

Geissleria acceptata

(Hust.) Lange-Bert. and Metzeltin 1996

Geissleria acceptata LM1 Geissleria acceptata LM3 Geissleria acceptata LM6 Geissleria acceptata LM2 Geissleria acceptata LM5 Geissleria acceptata LM4
Length Range
6–14 µm
Width Range
3.4-5.2 µm
Striae in 10 µm
12–18