Diatoms of North AmericaDiatoms of North America
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Compare Brachysira styriaca

(Grunow) R.Ross in B.Hartley 1986

Compare

Large valves of Brachysira styriaca are easily distinguished from other Brachysira species by the apically elongate central area with a median constriction. Small valves of B. styriaca may be distinguished from other species by a combination of valve shape and size, shape of the central area, striae count, and by its association with larger valves of B. styriaca.

LM scalebar = 10 µm
Brachysira styriaca LM1 Brachysira styriaca LM2 Brachysira styriaca LM3 Brachysira styriaca LM4 Brachysira styriaca LM5 Brachysira styriaca LM6 Brachysira styriaca LM7
Length Range
15.5-36.6 µm
Width Range
4.9-7.1 µm
Striae in 10 µm
26-30

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

Brachysira brebissonii

R.Ross in B.Hartley 1986

Brachysira brebissonii LM7 Brachysira brebissonii LM6 Brachysira brebissonii LM5 Brachysira brebissonii LM4 Brachysira brebissonii LM3 Brachysira brebissonii LM2 Brachysira brebissonii LM1
Length Range
11-36 µm
Width Range
4-8 µm
Striae in 10 µm
26-35

Brachysira hannae

(Reimer) Lange-Bert. and Moser 1994

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

Also compare to

Brachysira lehmanniae

Lange-Bert. and Gerd Moser 1994