Compare Gyrosigma reimeri
Gyrosigma sciotoense also has a "rotated" central area, but has one row of areolae around the apex and lacks distinct spots or depressions in the central area.
Gyrosigma attenuatum also has a rotated central area, but is considerably larger, with coarse striae.
LM scalebar = 10 µm
Length Range
66-138 µm
66-138 µm
Width Range
13-15 µm
13-15 µm
Striae in 10 µm
18-20 transverse; 22-24 longitudinal
18-20 transverse; 22-24 longitudinal
Length Range
130-255 µm
130-255 µm
Width Range
20-28 µm
20-28 µm
Striae in 10 µm
12-14 transverse; 10-12 longitudinal
12-14 transverse; 10-12 longitudinal
Also compare to
Gyrosigma sciotoense
BioData Reference
Sterrenburg 1994 Fig 1-7