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