Diatoms of North AmericaDiatoms of North America
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Compare Surirella suecica

Grunow in Van Heurck 1881

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Surirella suecica is easily distinguished from S. angusta; S. suecica is heteropolar while S. angusta is isopolar. Surirella suecica differs from S. minuta by its clavate shape and higher stria density. In addition, the fibulae of S. suecica are shorter and do not extend to the apical axis.

LM scalebar = 10 µm
Gc45805 Suecica 3 Gc111490B Suecica 2 Gc111490B Suecica 1 Gc110482A Suecica 1 Gc45805 Suecica 1 Gc105958A Suecica 1 Gc45805 Suecica 2
Length Range
14-34 µm
Width Range
7-9.5 µm
Striae in 10 µm
30-36

Surirella angusta

Kütz. 1844

Surirella angusta LM1 Surirella angusta LM5 Surirella angusta LM3 Surirella angusta LM6 Surirella angusta LM7 Surirella angusta LM2 Surirella angusta LM4
Length Range
15.5-60 µm
Width Range
6.5-12 µm
Striae in 10 µm
23-28

Surirella pinnata

W.Smith 1853

Surirella minuta LM1 Surirella minuta LM5 Surirella minuta LM2 Surirella minuta LM3 Surirella minuta LM6 Surirella minuta LM4 Surirella minuta LM7
Length Range
18-71 µm
Width Range
8.5-14 µm
Striae in 10 µm
25-32

Surirella stalagma

M.H.Hohn and Hellerman 1963

Surirella stalagma LM6 Surirella stalagma LM2 Surirella stalagma LM7 Surirella stalagma LM4 Surirella stalagma LM5 Surirella stalagma LM1 Surirella stalagma LM3
Length Range
11-16 µm
Width Range
5-7 µm
Striae in 10 µm
55