Navicula escambia differs from N. schroeteri in shape and valve width; N. schroeteri has wedge-shaped rostrate valve apices and is wider than 9 µm. Navicula escambia is larger (38.7 µm versus 28.8 µm) and lower in stria density than N. symmetrica. Furthermore, the central area of N. escambia is relatively large and distinct compared to the central area of N. symmetrica. The areolae of N. symmetrica are less distinguishable, and the Voigt faults are less distinct than those of N. escambia. The striae of N. erifuga are slightly convergent at the ends.

LM scalebar = 10 µm
Navicula escambia LM4 4  Navicula Escambia 103388B 11 Navicula escambia LM2 Navicula escambia LM3 Navicula escambia LM1 6  Navicula Escambia 103388B 15
Length Range
28.1-48.6 µm
Width Range
6.3-9.1 µm
Striae in 10 µm

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

Navicula symmetrica

R.M.Patrick 1944

Navicula symmetrica LM2 Navicula symmetrica LM3 Navicula symmetrica LM1 Navicula symmetrica LM6 Navicula symmetrica LM4 Navicula symmetrica LM9
Length Range
24-34.5 µm
Width Range
5-6.5 µm
Striae in 10 µm

Also compare to

Navicula schroeteri