Diatoms of North AmericaDiatoms of North America
Return to overview

Compare Gomphoneis mammilla

(Ehrenb.) Cleve 1894

Compare

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
Mammilla 001 Mammilla 003 Mammilla 005 Mammilla 002
Length Range
95-271 µm
Width Range
25-45 µm
Striae in 10 µm
7-9

Gomphoneis herculeana

(Ehrenb.) Cleve 1894

Gomphoneis herculeana LM1 Gomphoneis herculeana LM4B Gomphoneis herculeana LM4A Gomphoneis herculeana LM6 Gomphoneis herculeana LM2 Gomphoneis herculeana LM3 Gomphoneis herculeana LM5
Length Range
50-165 µm
Width Range
22-34 µm
Striae in 10 µm
8-12 in the central valve, 12-14 at the headpole, 13-16 at the footpole