Diatoms of North AmericaDiatoms of North America
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Compare Brachysira confusa

Van de Vijver, R.L.Albert, B.Kennedy and Kusber 2021

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Brachysira brebissonii is more rhombic to lanceolate, with acutely rounded apices.

Brachysira elisabethiana has an “H-shaped” thickening adjacent to the axial area. Valves are more rounded and lanceolate, with broadly rounded, and less protracted apices. The central area is larger

LM scalebar = 10 µm
Brachysira confusa LM1 Brachysira confusa LM2 Brachysira confusa LM3 Brachysira confusa LM7 Brachysira confusa LM4 Brachysira confusa LM5 Brachysira confusa LM6
Length Range
14.7-33.4 µm
Width Range
4.9-6.6 µm
Striae in 10 µm
28-29

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

Also compare to

Brachysira elisabethiana

Van de Vijver, Wetzel and Ector