Peranema granulifera Penard: Cell body elliposoidal or spherial; pellicle granulated; 8-15 μm long (Illustrations of The Japanese Fresh-water Algae, 1977).
Peranema trichophorum (Ehrenberg) Stein: 40-70 μm long (Kudo, 1966); 20-80 μm long (Illustrated Guide, 1985); 20-70 μm long (How to know the protozoa, 1979). 22-70 μm long, 10-20 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).