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Navicula libonensis has more lanceolate, less elliptic valves with narrower wedge-shaped apices and straight proximal raphe ends. Valves of N. erifuga have a smaller central area bordered by evenly spaced striae.

LM scalebar = 10 µm
Navicula eidrigiana LM4 Navicula eidrigiana LM5 Navicula eidrigiana LM3 Navicula eidrigiana LM6 Navicula eidrigiana LM2 Navicula eidrigiana LM7 Navicula eidrigiana LM1
Length Range
20.5-48.5 µm
Width Range
5.4-8.4 µm
Striae in 10 µm
12-14

Navicula libonensis

Schoeman 1969

Gs138229  Nalib3 Navicula libonensis LM3 Gs138229  Nalib1 Gs138229  Nalib2 Navicula libonensis LM2 Navicula libonensis LM1
Length Range
27-35 µm
Width Range
5.9-7.0 µm
Striae in 10 µm
12-13

Navicula erifuga

Lange-Bert. in Krammer and Lange-Bert. 1985

Navicula erifuga LM7 Navicula erifuga LM2 Navicula erifuga LM4 Navicula erifuga LM5 Navicula erifuga LM6 Navicula erifuga LM3 Navicula erifuga LM1
Length Range
21-36 µm
Width Range
5–7 µm
Striae in 10 µm
12–14

Navicula perotii

R.M.Patrick and Freese 1961

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
10-11