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Compare Navicula oblonga

(Kütz.) Kütz. 1844

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Navicula oblonga is the only very large Navicula species in the U.S. that is linear in shape and lacks protracted ends. Navicula oblonga is distinguished from N. aurora and N. reinhardtii by linear valves, bent terminal striae, and simple proximal raphe ends. Navicula reinhardtii also has a transverse central area and coarser areolae. Navicula oblonga is commonly misidentified as a species of Pinnularia. It differs from Pinnularia by having lineate striae.

LM scalebar = 10 µm
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

Navicula aurora

Sovereign 1958

Navicula aurora LM6 Navicula aurora LM1 Navicula aurora LM2 Navicula aurora LM3 Navicula aurora LM4 Navicula aurora LM5
Length Range
65-130 µm
Width Range
18-28 µm
Striae in 10 µm
7-9

Navicula reinhardtii

(Grunow) Grunow 1880

Navicula reinhardtii LM5 Navicula reinhardtii LM4 Navicula reinhardtii LM3 Navicula reinhardtii LM2 Navicula reinhardtii LM1
Length Range
34-48 µm
Width Range
14.5-17.0 µm
Striae in 10 µm
8-9

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