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 sp. Gruber 1879,
cell body 64 μm long, μm wide,
x 640, Naruto town, Chiba Pref., Japan, September 2003 by Y. Tsukii
31 μm
63 μm
94 μm; x 640