Diatoms of North AmericaDiatoms of North America
Return to overview

Guide to Gyrosigma reimeri

Sterrenburg 1994

Gyrosigma reimeri guide2
  1. Valves moderately sigmoid
  2. Raphe slightly sigmoid
  3. Central area rotated in relation to axial area
  4. Central area with "spots"

Valves are moderately sigmoid. The central area is rotated with respect to the axial area, with depressions on the external surface that appear as distinct, dark spots in LM. The raphe is sigmoid, but almost straight in its central part. The terminal nodules are expanded.