Stauroneis finlandia may be distinguished from S. ursamaioris by its narrower, more attenuated apices and more widely spaced striae. Stauroneis americana has broadly rounded apices and straight, weakly expanded proximal raphe ends. Stauroneis kishinena lacks the subrostrate apices of S. finlandia and has more widely spaced striae. Stauroneis javanica, a fossil species from the Southern Hemisphere, has more weakly curved proximal raphe ends and narrower valves with unprotracted apices.

LM scalebar = 10 µm
Stauroneis finlandia LM2 Stauroneis finlandia LM1 Stauroneis finlandia LM5 Stauroneis finlandia LM4 Stauroneis finlandia LM3 Stauroneis finlandia LM7 Stauroneis finlandia LM6
Length Range
109-221 µm
Width Range
24-34 µm
Striae in 10 µm

Stauroneis kishinena

L.L.Bahls 2010

Stauroneis kishinena LM6 Stauroneis kishinena LM7 Stauroneis kishinena LM2 Stauroneis kishinena LM1 Stauroneis kishinena LM5 Stauroneis kishinena LM4 Stauroneis kishinena LM3
Length Range
122-182 µm
Width Range
26-33 µm
Striae in 10 µm

Stauroneis americana

Heiden in Schmidt et al. 1903

Stauroneis americana LM6 Stauroneis americana LM5 Stauroneis americana LM4 Stauroneis americana LM3 Stauroneis americana LM2 Stauroneis americana LM1
Length Range
136-214 µm
Width Range
32-46 µm
Striae in 10 µm

Also compare to

Stauroneis javanica

(Grunow) Cleve

Stauroneis ursamaioris

Lange-Bert. and Van de Vijver