Diatoms of North AmericaDiatoms of North America
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Compare Pinnularia pseudoparva

Krammer and Lange-Bert. 1999

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Pinnularia lagerstedtii lacks subcapitate apices and has shorter valves.

This taxon might resemble some species of Chamaepinnularia, especially C. krasskei, but P. pseudoparva has much larger valves.

LM scalebar = 10 µm
Pinnularia pseudoparva LM6 Pinnularia pseudoparva LM5 Pinnularia pseudoparva LM4 Pinnularia pseudoparva LM1 Pinnularia pseudoparva LM7 Pinnularia pseudoparva LM2 Pinnularia pseudoparva LM3
Length Range
22-31 µm
Width Range
5.4-6.4 µm
Striae in 10 µm
9-10

Pinnularia lagerstedtii

(Cleve) A.Cleve 1934

Pinnularia lagerstedtii LM4 Pinnularia lagerstedtii LM2 Pinnularia lagerstedtii LM7 Pinnularia lagerstedtii LM3 Pinnularia lagerstedtii LM5 Pinnularia lagerstedtii LM1 Pinnularia lagerstedtii LM6
Length Range
11-26 µm
Width Range
5.2-6.2 µm
Striae in 10 µm
9-10