Compare

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

Diatoms of North America is running a fundraising campaign to keep the servers in operation. We need you to reach our $25,000 fundraising goal.

If you use and appreciate DONA, make your DONAtion today.

For the Gift Designation, type "diatom" in the search box and select "Diatom Lab Research Fund". This is the designated fund for diatoms.org.