|  Species: 70-120 μm long, 
12-16 μm wide; elongate; 
three-ridged, rounded anteriorly and drawn out posteriorly; 
pellicle longitudinally striated; discoid chloroplasts numerous; two 
rod-shaped paramylon (paramylum) bodies (Kudo, 1966).  
90-100 μm long; 
body twisted, with three longitudinal ridges (How to know the protozoa, 1979). |