portrait

Description:

Gyrodinium mundulum cells are oval from the ventral side, slightly dorso-ventrally flattened. Epicone conical, wedge-shaped from the lateral side, hypocone slightly shorter than epicone from the ventral side and half as wide from the lateral side. Length 10 - 15 microns, width 7 - 10 microns. Cingulum 1-1.5 microns wide, distal end approximately 2 – 3 microns lower than the proximal and overhanging slightly. Sulcus shallow, barely visible. Apical groove begins at the intersection of the cingulum and sulcus, curves initially to the left and then back to the right towards the apex. Orange stigma present in hypocone, just to the left of the origin of the sulcus . Nucleus in the hypocone. Several yellow-green chloroplasts present in the epicone and hypocone. Generally very fast swimming.