Acanthocystis penardi shows numerous siliceous spines and scales inserting, and lying respectively, upon the surface of the cell forming the periplast. The central body from which all the axopodia originate is clearly visible. Scalebar indicates 25 µm.
Sample from sphagnum pond Dosenmoor near Neumuenster (Schleswig-Holstein, Germany). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.