Genus: Free-swimming; rigid oval; ventral surface convex; dorsal surface with a longitudinal groove;
flagella anterior; one long, directed anteriorly; the other shorter and trailing; fresh water
(Kudo, 1966).
Species:
Notosolenus sp. (or Tropidoscyphus sp. ?),
cell body 14 μm long, 7 μm wide, a flagellum 14 μm long,
x 400, Japan, 1998 by Y. Tsukii
50 μm
100 μm
150 μm; x 400