Compare Gyrosigma nodiferum
Gyrosigma sciotoense is similar in all aspects, except that it is considerably larger.
Gyrosigma reimeri has external depressions on the central area and lacks double curvature of the raphe slits.
Gyrosigma obtusatum has a symmetric central area and a higher stria density of transapical striae.
LM scalebar = 10 µm
Length Range
67-94 µm
67-94 µm
Width Range
10-12 µm
10-12 µm
Striae in 10 µm
19-20 transapical striae; 20-22 longitudinal rows of areolae
19-20 transapical striae; 20-22 longitudinal rows of areolae
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
53-154 µm
53-154 µm
Width Range
8-15 µm
8-15 µm
Striae in 10 µm
22-26
22-26
Also compare to
Gyrosigma sciotoense
BioData Reference
Sterrenburg 1994 Fig 1-7