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. Navicula cascadensis may be distinguished from other species of Geissleria by valve shape and coarse areolae.

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