Diatoms of North AmericaDiatoms of North America
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Compare Aulacoseira canadensis

(Hust.) Simonsen 1979

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Aulacoseira crassipunctata has round areolae. Aulacoseira granulata has very long spines on separation valves.

LM scalebar = 10 µm
Aulacoseira canadensis LM1 Aulacoseira canadensis LM6 Aulacoseira canadensis LM2 Aulacoseira canadensis LM3 Aulacoseira canadensis LM4 Aulacoseira canadensis LM5 Aulacoseira canadensis LM7
Diameter
5-16 µm
Width Range
13-22 µm
Striae in 10 µm
6-11

Aulacoseira crassipunctata

Krammer 1991

Aulacoseira crassipunctata LM6 Aulacoseira crassipunctata LM5 Aulacoseira crassipunctata LM3 Aulacoseira crassipunctata LM4 Aulacoseira crassipunctata LM1 Aulacoseira crassipunctata LM2
Diameter
4-12 µm
Width Range
9-18 µm
Striae in 10 µm
5.5-9

Aulacoseira granulata

(Ehrenb.) Simonsen 1979

Aulacoseira granulata LM1 Aulacoseira granulata LM2 Aulacoseira granulata LM3 Aulacoseira granulata LM4 Aulacoseira granulata LM5 Aulacoseira granulata LM6
Diameter
4-17 µm
Width Range
4-20 µm
Striae in 10 µm
8-18