The linear to linear-lanceolate shape is similar to N. cincta. Navicula perotii is distinguished by its larger size, a higher stria density, parallel to slightly convergent striae at the apices and a narrow axial area.

LM scalebar = 10 µm
Navicula perotii LM1 Navicula perotii LM6 Navicula perotii LM4 Navicula perotii LM5 Navicula perotii LM3 Navicula perotii LM2
Length Range
31.4-48.1 µm
Width Range
8.0-9.6 µm
Striae in 10 µm

Navicula cincta

(Ehrenb.) Ralfs in A.Pritch. 1861

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

Also compare to

Navicula eidrigiana


BioData Reference
Lange-Bertalot 2001 Pl 43 Fig 1-6