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Navicula aurora is distinguished from N. oblonga by its more elliptical (less linear) valves and straight terminal striae; from N. peregrina by its somewhat protracted ends and finer striae and areolae; from N. reinhardtii by its larger and more rounded (less transverse) central area and finer areolae; from N. sovereignii by its rounded rectangular central area and triangular proximal raphe ends; and from N. vulpina by its somewhat protracted ends and more transverse (less circular) central area.

LM scalebar = 10 µm
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 vulpina

Kütz. 1844

Navicula vulpina LM2 Navicula vulpina LM1 Navicula vulpina LM3 Navicula vulpina LM5 Navicula vulpina LM4
Length Range
85-110 µm
Width Range
17-19 µm
Striae in 10 µm
5-6 at the center, 6-8 at the ends

Navicula peregrina

(Ehrenb.) Kütz. 1844

Navicula peregrina LM5 Navicula peregrina LM4 Navicula peregrina LM3 Navicula peregrina LM2 Navicula peregrina LM1
Length Range
66-115 µm
Width Range
15.9-20.0 µm
Striae in 10 µm
6-7

Navicula sovereignii

L.L.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

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

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