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Navicula vilaplanii is similar, but has only slightly protracted apices.

LM scalebar = 10 µm
Navicula longicephala LM2 Navicula longicephala LM3 Navicula longicephala LM6 Navicula longicephala LM7 Navicula longicephala LM5 Navicula longicephala LM4 Navicula longicephala LM1
Length Range
17-22 µm
Width Range
3.1-4.0 µm
Striae in 10 µm
18-21

Navicula vilaplanii

(Lange-Bert. and Sabater) Lange-Bert. and Sabater in Rumrich et al. 2000

Navicula vilaplanii LM6 Navicula vilaplanii LM5 Navicula vilaplanii LM1 Navicula vilaplanii LM4 Navicula vilaplanii LM7 Navicula vilaplanii LM2 Navicula vilaplanii LM3
Length Range
12-15.5 µm
Width Range
2.5-3.3 µm
Striae in 10 µm
20-24