Frustules cylindrical, valves circular or nearly so and having two prominent ocelli on opposite sides of the cell at the periphery. Two to several large, central labiate processes are present. Cells occur singly or form zig-zag chains in flowing waters of elevated total dissolved solids.
Light Microscope Image(s)
Each image is accompanied by the genus and species, California Academy of Sciences slide number (ie. CAS 612010), location of the specimen on the slide, and dimension in microns.