Diatoms of North AmericaDiatoms of North America
Return to overview

Compare Gyrosigma reimeri

Sterrenburg 1994

Compare

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
Gyrosigma reimeri LM5 Gyrosigma reimeri LM3 Gyrosigma reimeri LM2 Gyrosigma reimeri LM7 Gyrosigma reimeri LM6 Gyrosigma reimeri LM1 Gyrosigma reimeri LM4
Length Range
66-138 µm
Width Range
13-15 µm
Striae in 10 µm
18-20 transverse; 22-24 longitudinal

Gyrosigma attenuatum

(Kütz.) Rabenh. 1853

Gyrosigma attenuatum LM4 Gyrosigma attenuatum LM10 Gyrosigma attenuatum LM14 Gyrosigma attenuatum LM8 Gyrosigma attenuatum LM2 Gyrosigma attenuatum LM6 Gyrosigma attenuatum LM12
Length Range
130-255 µm
Width Range
20-28 µm
Striae in 10 µm
12-14 transverse; 10-12 longitudinal

Also compare to

Gyrosigma sciotoense

(Sull. and Wormley) Cleve

BioData Reference
Sterrenburg 1994 Fig 1-7