Family: Body monopodial; pseudopods rare; locomotion by slight forward bulging; cysts common (Illustrated Guide, 1985). Genus: Body 6-9 times longer than broad; hyaline cap 1-2 times as long as broad (How to know the ptozoa, 1979). Hyaline cap usually present in locomotion; cysts uninucleate (Illustrated Guide, 1985). Species:

31 μm 63 μm 94 μm; x 640

Images of collecting locality: No.1, Ohyachi, Akita-Hachimantai, Kazuno city, Akita Pref., Japan, September 21, 2007 by Y. Tsukii