Diatoms of North AmericaDiatoms of North America
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Compare Chamaepinnularia witkowskii

(Lange-Bert. and Metzeltin) Kulikovskiy and Lange-Bert. 2010

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This taxon is easily mistaken for smaller species of the Sellaphora pupula species complex, but is distinguished by characteristic hyaline areas on each side of the raphe. The largest valves in the size range are larger than most other Chamaepinnularia species in temperate waters of North America.

LM scalebar = 10 µm
Chamaepinnulaira witkowskii LM1 Chamaepinnularia witkowskii LM2 Chamaepinnularia witkowskii LM3 Chamaepinnularia witkowskii LM4 Chamaepinnularia witkowskii LM5
Length Range
13-19 µm
Width Range
4.5-5.5 µm
Striae in 10 µm
25-28

Chamaepinnularia krookii

(Grunow) Lange-Bert. and Krammer 1999

Chamaepinularia krookii LM5 Chamaepinnularia krookii LM2 Chamaepinnularia krookii LM1 Chamaepinnularia krookii LM3 Chamaepinnularia krookii LM4 Chamaepinularia krookii LM6 Chamaepinularia krookii LM5
Length Range
18.8-22 µm
Width Range
4-5.1 µm
Striae in 10 µm
15-19