Compare Pinnularia formica
Pinnularia nodosa var. percapitata valves are smaller, with undulations are less extreme in their expansion. The valve surface is distinctly mottled.
LM scalebar = 10 µm
Length Range
84-162 µm
84-162 µm
Width Range
12-18 µm
12-18 µm
Striae in 10 µm
8-9
8-9
Length Range
42.5-69.7 µm
42.5-69.7 µm
Width Range
7.7-10.6 µm
7.7-10.6 µm
Striae in 10 µm
10
10
