The rhombic-lanceolate valves, acutely rounded apices, and straight, weakly expanded proximal raphe ends make S. acuta distinctly different from most other large Stauroneis species with pseudosepta. Stauroneis terryi attains a much larger size and has a wider raphe and axial area.

LM scalebar = 10 µm
Stauroneis acuta LM5 Stauroneis acuta LM4 Stauroneis acuta LM3 Stauroneis acuta LM2 Stauroneis acuta LM1
Length Range
121-175 µm
Width Range
21-29 µm
Striae in 10 µm

Also compare to

Stauroneis terryi