7e05bd92cf9c47860c3c61193d2cdb47

Cells oval to oblong from the ventral side, dorso-ventrally flattened. Length 29 - 36 microns, width 16 - 26 microns, length to width ratio 1. 2 - 1.8. Cingulum beginning 0.2 - 0.3 of the cell length from the apex, initially narrow then becoming relatively wide (2 - 3 microns), following an almost horizontal path around the cell. Distal end of cingulum narrowing, approximately one cingulum width lower than the proximal end. Sulcus curving initially towards the right, then back to the left, reaching the antapex, left side of the hypocone appears to form an overlapping 'flap' on the right side. Short sulcal extension present on the epicone. Apical groove present, continuing from the sulcal extension in an anticlockwise spiral around the apex. Longitudinal flagellum arising in a pocket 0.5 - 0.6 of the cell length from the apex, slightly to the left of the mid ventral line. Flagellar pocket approximately 1 microns wide, covered by the left flap of the hypocone, continues in a straight line to the posterior end. Nucleus oval, in the centre of the hypocone, relatively large, approximately 10 x 15 microns. Chloroplasts absent. Different coloured food particles and colourless lipid globules often present.