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Navicula aurora has a larger rectangular central area and large triangular proximal raphe ends. Navicula oblonga has linear valves, undifferentiated proximal raphe ends, bent terminal striae, and much finer areolae. Navicula sovereignii has a round central area, worm-like markings on the axial and central areas, finer areolae, and proximal raphe ends shaped like hammer heads.

LM scalebar = 10 µm
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

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 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

Navicula sovereignii

Bahls 2011

Navicula sovereignii LM1 Navicula sovereignii LM3 Navicula sovereignii LM2 Navicula sovereignii LM5 Navicula sovereignii LM4
Length Range
52-87 µm
Width Range
12.8-16.5 µm
Striae in 10 µm
8-10