Diatoms of North AmericaDiatoms of North America
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Compare Surirella atomus

Hust. 1955

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Surirella atomus is smaller than most other species of Surirella, with a width of 5-8 μm. Surirella atomus is easily confused with S. stalagma, but S. atomus lacks a capitate footpole and apical line. In addition, the headpole of S. stalagma is more narrow. Surirella atomus is distinguished from S. suecica by its broader fibulae.

LM scalebar = 10 µm
Surirella atomus LM5 Surirella atomus LM7 Surirella atomus LM1 Surirella atomus LM2 Surirella atomus LM4 Surirella atomus LM3 Surirella atomus LM6
Length Range
8-19 µm
Width Range
5-8 µm
Striae in 10 µm
Fibulae 8-10

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

Surirella suecica

Grunow in Van Heurck 1881

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