Diatoms of North AmericaDiatoms of North America
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Compare Brachysira hannae

(Reimer) Lange-Bert. and Moser 1994

Compare

Brachysira gravida is smaller, with concave margins, and a higher stria density. Brachysira arctoborealis is smaller. Brachysira apiculata is smaller, with a lower stria density, undulating valve margins and capitate apicies.

LM scalebar = 10 µm
Brachysira hannae LM1 Brachysira hannae LM2 Brachysira hannae LM Brachysira hannae LM5 Brachysira hannae LM4
Length Range
30-60 µm
Width Range
14-19 µm
Striae in 10 µm
20-22

Brachysira arctoborealis

Wolfe and Kling 2001

Brachysira arctoborealis LM1 Brachysira arctoborealis LM2 Brachysira arctoborealis LM3 Brachysira arctoborealis LM4 Brachysira arctoborealis LM5 Brachysira arctoborealis LM6
Length Range
21.7-48.2 µm
Width Range
7.2-12.1 µm
Striae in 10 µm
24-26

Also compare to

Brachysira gravida

Shayler and Siver

Brachysira apiculata

(C.S.Boyer) Lange-Bert. and Gerd Moser