Compare

Several medium to large Stauroneis species have transversely oblong, irregularly spaced areolae. Stauroneis akamina has lanceolate valves with short protracted apices.

LM scalebar = 10 µm
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

Stauroneis akamina

L.L.Bahls 2010

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
16-22

Also compare to

Stauroneis nobilis

Schum.