Genus: Both ends blunt (Illustrated Guide, 1985).
Similar to Condylostoma, but lacks undulating membrane; with ciliated peristomal field (How to know the protozoa, 1979).
Ovoid and flattened in shape; somatic ciliation uniform; peristome, with a large conspicuous AZM on the left edge,
spirals down to the cytostome; right edge lacks undulating membrane; a contractile vacuole posterior, connected
to two longitudinal canals (Carey, 1992).
cell body 110 μm long, 95 μm wide,
x 100, x 200, x 400, Shirasaka, Shirakawa, Fukushima Pref., October 1999, collected by H. Shiomizu, photo by Y. Tsukii
50 μm 100 μm 150 μm; x 400
31 μm 63 μm 94 μm; x 640