Compare Gomphoneis mammilla
Due to the large size, this diatom has been confused with Gomphoneis herculeana. It differs in the shape of the valve, much more coarse density of the striae and the prominent spines at the headpole..
LM scalebar = 10 µm
Length Range
95-271 µm
95-271 µm
Width Range
25-45 µm
25-45 µm
Striae in 10 µm
7-9
7-9
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
