Genus: Colony spherical; 8-16 cells of similar size, close together, mutually compressed;
2-layered gelatinous envelope; cells with 2 equal-length flagella;
2 contractile vacuoles anterior; nucleus central (Illustrated Guide, 1985).
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
