Diatoms of North AmericaDiatoms of North America
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Compare Gomphonema christensenii

R.L.Lowe and Kociolek 1984

Compare

Gomphonema apuncto is very narrow and linear. Gomphonema lousiananum is smaller, ranging from 3.8 to 5.5 µm in width. It also has relatively a wider axial area, that is, the striae are closer to the valve margin. Gomphonema stoermeri, G. freesei and G. amerhombicum all possess stigmoids.

LM scalebar = 10 µm
Gomphonema christenseni LM2 Gomphonema christenseni LM5 Gomphonema christenseni LM6 4 53920 Gchristenseni Holo 5 53920 Gchristenseni2 6 53920 Gchristenseni2 7 53920 Gchristenseni2
Length Range
32.8-57.4 µm
Width Range
6.1-7.8 µm
Striae in 10 µm
13-16

Gomphonema apuncto

J.H.Wallace 1960

Gomphonema apuncto LM4 Gomphonema apuncto LM1 Gomphonema apuncto LM3 Gomphonema apuncto LM2 Gomphonema apuncto LM5
Length Range
21.0-30.7 µm
Width Range
3.0-4.1 µm
Striae in 10 µm
13-16

Gomphonema louisiananum

Kalinsky 1984

Gomphonema louisiananum LM1 Gomphonema louisiananum LM2 Gomphonema louisiananum LM3 Gomphonema louisiananum LM4 Gomphonema louisiananum LM5 Gomphonema louisiananum LM6 Gomphonema louisiananum LM7
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 stoermeri

Kociolek and Kingston 1999

Gomphonema stoermeri LM7 Gomphonema stoermeri LM2 Gomphonema stoermeri LM3 Gomphonema stoermeri LM5 Gomphonema stoermeri LM1
Length Range
19-45 µm
Width Range
4-6 µm
Striae in 10 µm
13-15

Gomphonema freesei

R.L.Lowe and Kociolek 1984

Gc53921 Gomphonema Freesei 1 Gc53921 Gomphonema Freesei 2 Gc53921 Gomphonema Freesei 3 Gc53921 Gomphonema Freesei 4 Holotype Gc53921 Gomphonema Freesei 4B Holotype Gc53921 Gomphonema Freesei 5
Length Range
35.0-53.9 µm
Width Range
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

Gomphonema amerhombicum

E.Reichardt 2007

G Amerhombicum B Isotype 20170301 06 Cl G Amerhombicum A Isotype 20170301 08 Cl G Amerhombicum A Isotype 20170301 18 Cl G Amerhombicum B Isotype 20170301 05 Cl G Amerhombicum B Isotype 20170301 14 Cl G Amerhombicum B Isotype 20170301 09 Cl G Amerhombicum B Isotype 20170301 21 Cl
Length Range
22.5-60 µm
Width Range
5.6-7.7 µm
Striae in 10 µm
13-15 at mid-valve, up to 17 at headpole