Compare Gomphonema louisiananum | Species

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Gomphonema apuncto is more narrow and linear. Gomphonema christensenii has longer striae that extend into the axial area and a greater range of size. Gomphonema puiggarianum var. aequatorialis is larger, with a lower stria density.

LM scalebar = 10 µm

Length Range
13.5-38.3 µm

Width Range
3.8-5.5 µm

Striae in 10 µm
11-12 at the valve center, 14-16 at the apices

Gomphonema apuncto

J.H.Wallace 1960

Length Range
21.0-30.7 µm

Width Range
3.0-4.1 µm

Striae in 10 µm
13-16

Gomphonema christensenii

R.L.Lowe and Kociolek 1984

Length Range
32.8-57.4 µm

Width Range
6.1-7.8 µm

Striae in 10 µm
13-16

Also compare to

Gomphonema puiggarianum var. aequatorialis

Cleve