Compare Gomphonema freesei
Gomphonema caperatum has shorter, more narrow valves, and a more broadly lanceolate axial area.
Gomphonema christenseni lacks a stigmoid and the headpole end is more tapered.
Gomphonema incognitum is smaller in both length and width.
Gomphonema insularum has shorter, more narrow valves, a more broadly lanceolate axial area that does not expand into a defined central area and a sinuous raphe.
Gomphonema stoermeri has shorter, more narrow valves, a narrower axial area, and a smaller central area.
Gomphonema amerhombicum has more finely spaced striae (>14 in 10 µm) and the footpole has somewhat concave margins.
LM scalebar = 10 µm
Length Range
35.0-53.9 µm
35.0-53.9 µm
Width Range
6.5-7.5 µm
6.5-7.5 µm
Striae in 10 µm
12.1-14.5 at valve center, 14.2-16.2 at headpole, 11.7-15.4 at footpole
12.1-14.5 at valve center, 14.2-16.2 at headpole, 11.7-15.4 at footpole
Length Range
22.4-31.9 µm
22.4-31.9 µm
Width Range
4.4-5.2 µm
4.4-5.2 µm
Striae in 10 µm
14-16
14-16
Length Range
32.8-57.4 µm
32.8-57.4 µm
Width Range
6.1-7.8 µm
6.1-7.8 µm
Striae in 10 µm
13-16
13-16
Length Range
17.8-29.5 µm
17.8-29.5 µm
Width Range
5.0-5.8 µm
5.0-5.8 µm
Striae in 10 µm
13-16 at mid-valve; up to 18 at the apices
13-16 at mid-valve; up to 18 at the apices
Length Range
15.2-42 µm
15.2-42 µm
Width Range
4.4-7 µm
4.4-7 µm
Striae in 10 µm
13-16
13-16
Length Range
19-45 µm
19-45 µm
Width Range
4-6 µm
4-6 µm
Striae in 10 µm
13-15
13-15
Length Range
22.5-60 µm
22.5-60 µm
Width Range
5.6-7.7 µm
5.6-7.7 µm
Striae in 10 µm
13-15 at mid-valve, up to 17 at headpole
13-15 at mid-valve, up to 17 at headpole
