Compare Pinnularia scotica
Pinnularia nodosa is less capitate and has a larger fascia and a narrower axial area. Pinnularia nodosa var. percapitata has a central undulation wider than its distal undulations, a larger fascia and a narrower axial area.
LM scalebar = 10 µm
Length Range
54-71.6 µm
54-71.6 µm
Width Range
11.1-12.5 µm
11.1-12.5 µm
Striae in 10 µm
8-10
8-10
Length Range
40.9-65.2 µm
40.9-65.2 µm
Width Range
7.6-9.3 µm
7.6-9.3 µm
Striae in 10 µm
9-11
9-11
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
