Genus: Peristome circular, vestibule anterior; cytostome left-ventral, a slit;
body cup-shaped; colonial, in gelatinous, dichotomous loricae;
swims backwards (How to know the protozoa, 1979).
Species: 100-150 μm
(How to know the protozoa, 1979).
Maryna socialis (small variety ?),
cell body 72 μm long, 52 μm wide,
x 100, x 200, x 400, x 640, Akigase park, Saitama city, Saitama Pref., Japan, October 1998, by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640