Compare Gomphonema superiorense
Gomphonema pygmaeum has a linear-clavate valve and rounded apices.
Gomphonema chinense has a broad axial area and narrow footpole.
Gomphonema subtile has larger valves that are more strongly heteropolar.
Gomphonema parvulum has a linear-clavate shape and less protracted apices.
LM scalebar = 10 µm
Length Range
23.2-26 µm
23.2-26 µm
Width Range
3.6-4.2 µm
3.6-4.2 µm
Striae in 10 µm
13-14 in the valve center, 15-16 at the headpole, 14-15 at the footpole
13-14 in the valve center, 15-16 at the headpole, 14-15 at the footpole
Length Range
10-40 µm
10-40 µm
Width Range
3-5 µm
3-5 µm
Striae in 10 µm
10-13 in the center, 14-16 at the footpole
10-13 in the center, 14-16 at the footpole
