Non-motile cells spherical, 5–8 micrometers in diameter. Flagella, even reduced ones, not observed. Dinokaryon located in the middle or offset to one side of the cell. Free-living motile cells 9.1–11.4 micrometers long and 5.7–9.4 micrometers wide. Motile cells unarmored, oval to elongate oval from the ventral side, slightly flattened dorsoventrally, covered with tetragonal, pentagonal, or hexagonal amphiesmal vesicles. Amphiesmal vesicles arranged in a latitudinal series, four on the epicone, three in the cingular groove, and three on the hypocone. Horseshoe-shaped apical groove running in an counterclockwise loop around the apex. A row of six amphiesmal vesicles along the apical groove displays many small knobs in a regular arrangement. Cingulum wide and relatively shallow, descending and displaced one cingulum width. Sulcus narrow and shallow, running straight to the apex and connected to the onset of the apical groove. A typical dinokaryon located in the middle of the cell. Nuclear envelope with vesicular chambers. NFC linked the proximal parts of transverse and longitudinal basal body with the nucleus. Chloroplasts yellow-brown, located peripherally, with pyrenoid. Trichocysts and peduncle present.