Stauroneis akamina belongs to a group of medium to large Stauroneis species with oblong areolae that are often irregularly spaced. It differs from S. nobilis by its smooth valve outline and smaller size. Stauroneis alabamae is larger and has a lower stria density. Stauroneis margaritorae is shorter (60-90 µm) with narrower valves (13-16 µm). Stauroneis nobilis var. minima has smaller valves with narrower apices. Stauroneis baconiana has linear valves that are much narrower.

LM scalebar = 10 µm
Stauroneis akamina LM7 Stauroneis akamina LM6 Stauroneis akamina LM5 Stauroneis akamina LM4 Stauroneis akamina LM3 Stauroneis akamina LM2 Stauroneis akamina LM1
Length Range
63-140 µm
Width Range
16-24 µm
Striae in 10 µm

Stauroneis baconiana

Stodder 1859

Stauroneis baconiana LM1 Stauroneis baconiana LM2 Stauroneis baconiana LM3 Stauroneis baconiana LM4 Stauroneis baconiana LM5 Stauroneis baconiana LM6
Length Range
73-139 µm
Width Range
9-18 µm
Striae in 10 µm
16 in the center, 20 at the ends

Also compare to

Stauroneis nobilis


Stauroneis alabamae


Stauroneis margaritorae

Lange-Bert., Cavacini, Tagliaventi, and Alfinito

Stauroneis nobilis var. minima