Stauroneis pax is easily distinguished from S. fluminea and S. gracilis by its exaggerated bow-tie shaped stauros, more strongly radiate striae and multiple short striae within the central area. Stauroneis pax may be distinguished from S. acidoclinata by its larger, especially wider, less linear valves and exaggerated stauros with multiple short striae.

LM scalebar = 10 µm
Stauroneis pax LM6 Stauroneis pax LM5 Stauroneis pax LM4 Stauroneis pax LM2 Stauroneis pax LM3 Stauroneis pax LM1
Length Range
62-90 µm
Width Range
13.9-17.5 µm
Striae in 10 µm

Stauroneis gracilis

Ehrenb. 1843

Stauroneis gracilis LM7 Stauroneis gracilis LM6 Stauroneis gracilis LM1 Stauroneis gracilis LM4 Stauroneis gracilis LM3 Stauroneis gracilis LM2
Length Range
68-127 µm
Width Range
13-22 µm
Striae in 10 µm

Stauroneis acidoclinata

Lange-Bert. and Werum 2004

Stauroneis acidoclinata LM7 Stauroneis acidoclinata LM6 Stauroneis acidoclinata LM5 Stauroneis acidoclinata LM3 Stauroneis acidoclinata LM2 Stauroneis acidoclinata LM1
Length Range
35-70 µm
Width Range
7.4-11.5 µm
Striae in 10 µm

Also compare to

Stauroneis fluminea

R.M.Patrick and Freese