Cyclopyxis stellata (Wailes, 1927) Deflandre, 1929
Centropyxis stellata Wailes, 1927
Diagnosis: The shell is very large, hemispherical in profile, rounded in plan. The ventral side is concave, in its center there is a five-lobed (less often three- or four-lobed) mouth, the diameter of which is almost a third of the shell diameter.
Dimensions: Diameter of shell 335-400 µm; height of shell 250-290 µm; diameter of aperture 115-155 µm.
Ecology: Freshwater. Cortes Island, British Columbia, Canada, North America.