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Valves of Navicula angusta lack the tumid center. Navicula oblonga is larger and more robust than N. piercei.

LM scalebar = 10 µm
Navicula piercei LM6 Navicula piercei LM5 Navicula piercei LM4 Navicula piercei LM3 Navicula piercei LM2 Navicula piercei LM1 Navicula piercei LM7
Length Range
64-76 µm
Width Range
6.8-8.0 µm
Striae in 10 µm
11-13

Navicula angusta

Grunow 1860

Navicula angusta LM3 Navicula angusta LM5 Navicula angusta LM4 Navicula angusta LM6 Navicula angusta LM2 Navicula angusta LM1 Navicula angusta LM7
Length Range
35-70 µm
Width Range
6-7 µm
Striae in 10 µm
11-12

Navicula oblonga

(Kütz.) Kütz. 1844

Navicula oblonga LM6 Navicula oblonga LM5 Navicula oblonga LM4 Navicula oblonga LM3 Navicula oblonga LM2 Navicula oblonga LM1
Length Range
86-176 µm
Width Range
15-19 µm
Striae in 10 µm
7-9

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