Description of Nassulopsis elegans:
Synhymeniid ciliate, 200-300 micrometres in length. Body elongate ovoid, cylindrical, rounded at both ends, narrower in the anterior. With anterior blue or violet pigmented spot. Long cytopharyngeal basket, diagonally positioned in anterior third. Somatic ciliation uniform, with transverse synhymenium (hypostomial frange) slightly behind the oral aperture, crossing the entire ventral surface and almost encircling the cell. Multiple contractile vacuoles, usually 5 or more in longitudinal series behind the cytostome. Single macronucleus, large and ellipsoid in posterior half. Feeds on cyanobacteria. Freshwater and marine.