Compare Stauroneis finlandia
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
Length Range
109-221 µm
109-221 µm
Width Range
24-34 µm
24-34 µm
Striae in 10 µm
13-15
13-15
Length Range
122-182 µm
122-182 µm
Width Range
26-33 µm
26-33 µm
Striae in 10 µm
11-12
11-12
Length Range
136-214 µm
136-214 µm
Width Range
32-46 µm
32-46 µm
Striae in 10 µm
11-14
11-14
