Diatoms of North AmericaDiatoms of North America
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Compare Gomphonema semiapertum

Grunow in Van Heurck 1880

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This taxon is quite distinctive for its large size and expanded, asymmetric central area.

LM scalebar = 10 µm
Gomphonema semiapertum LM1 Gomphonema semiapertum LM2 Gomphonema semiapertum LM3 Gomphonema semiapertum LM4 Gomphonema semiapertum LM5 Gomphonema semiapertum LM6 Gomphonema semiapertum LM7
Length Range
74.2-113.2 µm
Width Range
10.3-14.1 µm
Striae in 10 µm
9-12

Gomphonema californicum

Stancheva and Kociolek 2016

Gomphonema californicum LM3 Gomphonema californicum LM1 Gomphonema californicum LM2 Gomphonema californicum LM4 Gomphonema californicum LM5 Gomphonema californicum LM6
Length Range
22-69 µm
Width Range
5.6-8.3 µm
Striae in 10 µm
10-15