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Valves of S. smithii are longer than 20 ┬Ám and the smallest valves of this species have a smooth rather than a triundulate outline.

LM scalebar = 10 µm
Stauroneis separanda LM5 Stauroneis separanda LM4 Stauroneis separanda LM3 Stauroneis separanda LM2 Stauroneis separanda LM1
Length Range
13.9-15.3 µm
Width Range
3.8-4.8 µm
Striae in 10 µm
30

Stauroneis smithii

Grunow 1860

Stauroneis smithii LM6 Stauroneis smithii LM5 Stauroneis smithii LM4 Stauroneis smithii LM3 Stauroneis smithii LM2 Stauroneis smithii LM1
Length Range
18-28 µm
Width Range
5.8-7.7 µm
Striae in 10 µm
25-30