Diatoms of North AmericaDiatoms of North America
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Compare Navicula cincta

(Ehrenb.) Ralfs in A.Pritch. 1861

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Navicula cari has a larger, transversely rectangular central area. Valves of N. seibigiana have protracted apices. Navicula microdigitoradiata is larger with a higher stria density. The relatively coarse, widely-spaced striae and fine areolae give a superficial resemblance to some species of Pinnularia.

LM scalebar = 10 µm
Navicula cincta LM7 Navicula cincta LM6 Navicula cincta LM5 Navicula cincta LM4 Navicula cincta LM3 Navicula cincta LM2 Navicula cincta LM1
Length Range
17-27 µm
Width Range
4.0-5.6 µm
Striae in 10 µm
9-10 in center valve, 11-13 at the apices

Navicula cari

Ehrenb. 1836

Navicula cari LM7 Navicula cari LM6 Navicula cari LM5 Navicula cari LM4 Navicula cari LM3 Navicula cari LM2 Navicula cari LM1
Length Range
27-52 µm
Width Range
6.3-9.0 µm
Striae in 10 µm
10-13

Navicula seibigiana

Lange-Bert. 1993

Navicula seibigiana LM6 Navicula seibigiana LM2 Navicula seibigiana LM5 Navicula seibigiana LM1 Navicula seibigiana LM4 Navicula seibigiana LM7 Navicula seibigiana LM3
Length Range
26-29 µm
Width Range
5.2-5.8 µm
Striae in 10 µm
11-12

Also compare to

Navicula microdigitoradiata

Lange-Bert.