Compare Gomphoneis herculeana
This species is most easily confused with G. minuta, which is more widely distributed in North America. Gomphoneis minuta valves are comparatively smaller (length and width) and more linear in shape.
LM scalebar = 10 µm
Length Range
50-165 µm
50-165 µm
Width Range
22-34 µm
22-34 µm
Striae in 10 µm
8-12 in the central valve, 12-14 at the headpole, 13-16 at the footpole
8-12 in the central valve, 12-14 at the headpole, 13-16 at the footpole
Length Range
20-128 µm
20-128 µm
Width Range
14-26 µm
14-26 µm
Striae in 10 µm
10-12
10-12
