Compare Stauroneis rex
Stauroneis phoenicenteron has smaller valves than S. rex (26-35 µm wide by 129-199 µm long) and a higher stria density (15-18 in 10 µm). It is likely that S. rex has been misidentified as S. phoenicenteron in U.S. surveys. Stauroneis terryi has septa and pseudosepta. Stauroneis baileyi, reported from Connecticut, has rhombic-lanceolate valves with narrower, more attenuated ends.
LM scalebar = 10 µm
Length Range
215-386 µm
215-386 µm
Width Range
38-60 µm
38-60 µm
Striae in 10 µm
12-14
12-14
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
154-388 µm
154-388 µm
Width Range
35-58 µm
35-58 µm
Striae in 10 µm
11-13
11-13
