Diatoms of North AmericaDiatoms of North America
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Compare Nitzschia fonticola

(Grunow) Grunow in Van Heurck 1881

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Nitzschia oregona is more narrow.
Nitzschia tropica is more linear, has a straight raphe, and has not been verified from North America.

LM scalebar = 10 µm
Fonticola 001 Fonticola 004 Fonticola 002 Fonticola 011 Fonticola 005 Fonticola 003 Fonticola 007
Length Range
10-55 µm
Width Range
2.5-4.5 µm
Striae in 10 µm
24-27

Nitzschia oregona

Sovereign 1958

Nitzschia oregona LM1 Nitzschia oregona LM3 Nitzschia oregona LM2 Nitzschia oregona LM5 Nitzschia oregona LM4
Length Range
15-42 µm
Width Range
3 µm
Striae in 10 µm
23-25

Also compare to

Nitzschia tropica

Hust. 1949