Compare Pinnularia cuneicephala
Pinnularia acrosphaeria is smaller, has broadly rounded apices, a narrower axial area and a less sinuous deflection of the proximal raphe ends.
Pinnularia bihastata has a more narrow axial area.
LM scalebar = 10 µm
Length Range
79-142 µm
79-142 µm
Width Range
14-19 µm
14-19 µm
Striae in 10 µm
6-7
6-7
Length Range
52.7-82.9 µm
52.7-82.9 µm
Width Range
9.7-12.0 µm
9.7-12.0 µm
Striae in 10 µm
11-13
11-13
Length Range
142-208 µm
142-208 µm
Width Range
26-30 µm
26-30 µm
Striae in 10 µm
5-6
5-6
