Diatoms of North AmericaDiatoms of North America
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Compare Pseudostaurosira robusta

(Fusey) D.M.Williams and Round 1988

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Larger specimens of Staurosira construens var. binodis are similar in valve outline, however, the areolae are not resolvable in LM. Valves are bi-undulate shape however, see graph and comments.

LM scalebar = 10 µm
Cas 184007 08042014 0046 Clm Cas 184007 08042014 005 Clm Cas 184007 08042014 0028 Clm Cas 184007 08042014 003 Clm1 Cas 184007 08042014 0013 Clm Cas 184007 08042014 0055 Clm Cas 184007 08042014 0042 Clm
Length Range
13.3-17.1 µm
Width Range
2.6-4.1 µm
Striae in 10 µm
14-16

Staurosira binodis

(Ehren. ex Kütz.) Lange-Bert. 2011

Staurosira construens var binodis LM1 Staurosira construens var binodis LM1 Staurosira construens var binodis LM3 Staurosira construens var binodis LM4 Staurosira construens var binodis LM2
Length Range
7-21 µm
Width Range
4-6 µm
Striae in 10 µm
13-16

Pseudostaurosira pseudoconstruens

(Marciniak) D.M.Williams and Round 1987

Pseudostaurosira pseudoconstruens LM4 Pseudostaurosira pseudoconstruens LM1 Pseudostaurosira pseudoconstruens LM6 Pseudostaurosira pseudoconstruens LM7 Pseudostaurosira pseudoconstruens LM3 Pseudostaurosira pseudoconstruens LM2
Length Range
8-15.5 µm
Width Range
3.5-7 µm
Striae in 10 µm
8.5 near the center increasing to 18 at the apices