Genus: Emergent flagellum mobile throughout its length during swimming; colourless; no eyespot;
cell body rigid; cylindrical, not flattened; canal opening subapical; paramylon and lipid abundant;
fresh water (Illustrated Guide, 1985).
Body rigid, cylindrical, more or less arched; pellicle longitudinally ridged;
a flagellum at apex (Kudo, 1966).
Images of collecting locality:
Japanese Skunk Cabbage marsh, Tsugaike highland (Tsugaike Natural Park), Otari village, Nagano Pref., Japan, August 11, 2006 by Y. Tsukii