Compare Gomphonema germainii
Gomphonema gracile has more more acute apices and a narrow axial area.
Gomphonema affine has wider valves (7-12 µm).
Gomphonema insigne has wider valves (7.5-13 µm) and coarser striae (6-8 in 10 µm).
Gomphonema submehleri has a more strongly clavate valve outline, wider valves (5.2-7.8 µm), and a higher head pole stria density (14-16 in 10 µm).
LM scalebar = 10 µm
Length Range
24.7-43.8 µm
24.7-43.8 µm
Width Range
4.6-6.3 µm
4.6-6.3 µm
Striae in 10 µm
10-12 at the valve center, 12-14 at the headpole, 14-15 at the footpole
10-12 at the valve center, 12-14 at the headpole, 14-15 at the footpole
Length Range
24.9-37.2 µm
24.9-37.2 µm
Width Range
5.2-7.8 µm
5.2-7.8 µm
Striae in 10 µm
10-12 at the valve center, 14-16 at the head pole, 14-15 at the foot pole
10-12 at the valve center, 14-16 at the head pole, 14-15 at the foot pole
