Chaos carolinense (Wilson, 1900) King & Jahn, 1948

Dimensions: Mostly polypodial, with more than thousand mainly biconvex nuclei. Crystals mainly bipyramidal or flat. Cysts known.

Dimensions: Polypodial form about 700-2000 µm long, monopodial form up to 3 mm, sometimes 5 mm. Nuclei 22-31 µm.

Habitat: Freshwater. North-America.