Genus: Unicells; cell body spherical in shape; cell wall warty or wrinkled
(Illustrations of The Japanese Fresh-water Algae, 1977).
Cell wall with warts or a network of ridges or lines (Dillard, Common Freshwater Algae of the United States, J. Cramer 1999).
Species: Cell body spherical, 8-26 μm in diam.;
cell wall covered with reticulated ridges (Introduction to the Freshwater Algae, 1999).
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