Diatoms of North AmericaDiatoms of North America
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Compare Gyrosigma obscurum

(W.Sm.) J.W.Griff. and Henfr. 1856

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G. balticum var. californicum has less eccentric raphe, and has strongly deflected proximal raphe ends.

LM scalebar = 10 µm
Gyrosigma Obscurum Me10042 D 012318 01 Gyrosigma Obscurum Me10042 A 102417 54 C Gyrosigma Obscurum Me10042 A 102417 18 C Gyrosigma Obscurum Me10042 C 012318 04 C Gyrosigma Obscurum Me10042 A 102417 36 C
Length Range
118-143 µm
Width Range
11-12 µm
Striae in 10 µm
28-29

Also compare to

Gyrosigma balticum var. californicum

Cleve and J.D.Möller