Compare Stauroneis gracilis
Stauroneis supergracilis has narrower valves relative to their length, more subtly protracted apices, and a lower areolae density (14-18 in 10 µm). Valves of S. subborealis are more linear, especially in small specimens. Stauroneis phoenicenteron lacks protracted apices and has straight proximal raphe ends.
LM scalebar = 10 µm
Length Range
68-127 µm
68-127 µm
Width Range
13-22 µm
13-22 µm
Striae in 10 µm
15-18
15-18
Length Range
129-199 µm
129-199 µm
Width Range
26-35 µm
26-35 µm
Striae in 10 µm
15-18
15-18
Length Range
46-142 µm
46-142 µm
Width Range
9-24 µm
9-24 µm
Striae in 10 µm
17-20
17-20
Length Range
124-213 µm
124-213 µm
Width Range
21-33 µm
21-33 µm
Striae in 10 µm
15-16
15-16
