Gymnodinium fuscum

Gymnodinium fuscum,. common freshwater dinoflagellates, with greatly folded radiating plastid, red granules near middle or in posterior half of the cell. With equatorial groove - the cingulum more or less running around the middle of the cell, the longitudinal groove - the sulcus - not strongly developed. This is the type species of the genus Gymnodinium. Differential interference contrast.

Gymnodinium fuscum,. common freshwater dinoflagellates, with greatly folded radiating plastid, red granules near middle or in posterior half of the cell. This image focusses on the surface to show the equatorial groove - the cingulum, and the longitudinal groove - the sulcus. This is the type species of the genus Gymnodinium. Differential interference contrast.